1<!doctype html> 2<!--[if lt IE 7]><html class="no-js lt-ie9 lt-ie8 lt-ie7" lang="en"> <![endif]--> 3<!--[if IE 7]><html class="no-js lt-ie9 lt-ie8" lang="en"> <![endif]--> 4<!--[if IE 8]><html class="no-js lt-ie9" lang="en"> <![endif]--> 5<!--[if IE 9 ]><html class="ie9 no-js"> <![endif]--> 6<!--[if (gt IE 9)|!(IE)]><!--> <html class="no-touch no-js"> <!--<![endif]--> 7<head> 8 9 <!-- Basic page needs ================================================== --> 10 <meta charset="utf-8"> 11 <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> 12 13 14 15 <!-- Title and description ================================================== --> 16 <title> 17 DRT Cylinder Head Kit YAMAHA YZ125(X) 2005+ – BeRAD Moto 18 </title> 19 20 21 <meta name="description" content="DRT Cylinder Head Kit YAMAHA YZ125(X) 2005+ DRT cylinder heads are the cutting edge of cylinder head design, offering optimized performance for every riding style. Proudly designed and manufactured in the United States! Fitment: YAMAHA YZ125 2005+ YAMAHA YZ125X 2020+ CLICK HERE FOR INSTALL VIDEO! Base Cylinder Head Kit"> 22 23 24 <!-- Product meta ================================================== --> 25 26 <meta property="og:type" content="product"> 27 <meta property="og:title" content="DRT Cylinder Head Kit YAMAHA YZ125(X) 2005+"> 28 <meta property="og:url" content="https://berad-products.myshopify.com/products/drt-cylinder-head-kit-yamaha-yz125x-2005"> 29 30 <meta property="og:image" content="http://berad-products.myshopify.com/cdn/shop/files/DRT-HD842-R1-BLUE-DOME_grande.jpg?v=1778905733"> 31 <meta property="og:image:secure_url" content="https://berad-products.myshopify.com/cdn/shop/files/DRT-HD842-R1-BLUE-DOME_grande.jpg?v=1778905733"> 32 33 <meta property="og:image" content="http://berad-products.myshopify.com/cdn/shop/files/DRT-HD842-R1-RAW-DOME_grande.jpg?v=1778905733"> 34 <meta property="og:image:secure_url" content="https://berad-products.myshopify.com/cdn/shop/files/DRT-HD842-R1-RAW-DOME_grande.jpg?v=1778905733"> 35 36 <meta property="og:image" content="http://berad-products.myshopify.com/cdn/shop/files/DRT-DM842-R1A_grande.jpg?v=1778905733"> 37 <meta property="og:image:secure_url" content="https://berad-products.myshopify.com/cdn/shop/files/DRT-DM842-R1A_grande.jpg?v=1778905733"> 38 39 <meta property="og:price:amount" content="280.00"> 40 <meta property="og:price:currency" content="USD"> 41 42 43 <meta property="og:description" content="DRT Cylinder Head Kit YAMAHA YZ125(X) 2005+ DRT cylinder heads are the cutting edge of cylinder head design, offering optimized performance for every riding style. Proudly designed and manufactured in the United States! Fitment: YAMAHA YZ125 2005+ YAMAHA YZ125X 2020+ CLICK HERE FOR INSTALL VIDEO! Base Cylinder Head Kit"> 44 45 <meta property="og:site_name" content="BeRAD Moto"> 46 47 48 49 50<meta name="twitter:card" content="summary"> 51 52 53 54 <meta name="twitter:card" content="product"> 55 <meta name="twitter:title" content="DRT Cylinder Head Kit YAMAHA YZ125(X) 2005+"> 56 <meta name="twitter:description" content="DRT Cylinder Head Kit YAMAHA YZ125(X) 2005+ DRT cylinder heads are the cutting edge of cylinder head design, offering optimized performance for every riding style. Proudly designed and manufactured in the United States! Fitment: YAMAHA YZ125 2005+ YAMAHA YZ125X 2020+ CLICK HERE FOR INSTALL VIDEO! Base Cylinder Head Kit Includes: Head Dome O-Ring Kit (3 pieces) Copper Washer Kit Installation Instructions  Benefits compared to stock: -Optimized performance: more power where you need it, when you need it -Choose between 3 dome insert options. Order one, two, or all 3 to unlock full control over the feel of your engine. Each dome offers very different power delivery characteristics! -Increased detonation resistance: more efficient combustion gains performance while also increasing reliability -Better cooling: targeted heat removal where itâs most needed, giving further reliability gains -Cleaner, more consistent jetting -Reduced fuel consumption"> 57 <meta name="twitter:image" content="https://berad-products.myshopify.com/cdn/shop/files/DRT-HD842-R1-BLUE-DOME_medium.jpg?v=1778905733"> 58 <meta name="twitter:image:width" content="240"> 59 <meta name="twitter:image:height" content="240"> 60 61 62 63 <!-- Helpers ================================================== --> 64 <link rel="canonical" href="https://berad-products.myshopify.com/products/drt-cylinder-head-kit-yamaha-yz125x-2005"> 65 <meta name="viewport" content="width=device-width,initial-scale=1"> 66 67 68 <!-- Ajaxify Cart Plugin ================================================== --> 69 <link href="//berad-products.myshopify.com/cdn/shop/t/7/assets/ajaxify.scss.css?v=101617718950719963771782154271" rel="stylesheet" type="text/css" media="all" /> 70 71 72 <!-- CSS ================================================== --> 73 <link href="//berad-products.myshopify.com/cdn/shop/t/7/assets/timber.scss.css?v=56966519306435458771
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317pace\"\u003e \u003c\/span\u003ecompression ratio, they each have chamber geometry optimized for specific power delivery profiles. Please refer to the descriptions below to decide what will best suit you and your riding! Domes D and E provide the most peak power and require high octane fuel to prevent detonation. See specifications and power descriptions below.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome A (low compression\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e Low end improvement compared to stock with a linear feeling mid range into a free-revving top end. The most friendly to ride but not lacking in torque or response. Great for beginner riders but plenty of fun for experienced riders too! Offers great control of traction in slick conditions.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome B (mid compression\u003cmeta charset=\"utf-8\"\u003e\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e \u003cmeta charset=\"utf-8\"\u003eLow end improvement compared to stock with a quick ramp into strong top end pull. Slight bottom end torque increase from Dome A with a quicker revving and harder hitting power band compared to dome A. For the rider that keeps it at wide open.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome C (high compression\u003cmeta charset=\"utf-8\"\u003e\/91+ octane***):\u003c\/strong\u003e\u003c\/span\u003e Luggable low end with a broad mid range. Offers the most low end torque and peak power. Snappy and \"connected with throttle\" feel. Yeah, this one pulls hard! ***Higher octane fuel may required for faster riders*** \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome D (high compression\/100+ octane):\u003c\/strong\u003e\u003c\/span\u003e COMING SOON! Similar power curve to Dome C but MORE power across the rev range! 100+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome E (high compression\/110+ octane):\u003c\/strong\u003e\u003c\/span\u003e COMING SOON! \u003cmeta charset=\"utf-8\"\u003eSimilar power curve to Dome C\/D but EVEN MORE power across the rev range! 110+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Moto strongly recommend hiring professional help for installation. \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Moto are not responsible for any injury or damages resulting from use or installation of this product.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eReturn Policy: Returns of unused and undamaged items will be accepted within 30 days of the shipping date. 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Proudly designed and manufactured in the United States!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eFitment:\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eYAMAHA YZ125 2005+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003eYAMAHA YZ125X 2020+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003ca rel=\"noopener\" title=\"DRT Cylinder Head Install Tutorial\" href=\"https:\/\/www.youtube.com\/watch?v=mUKkQuCiHk4\" target=\"_blank\"\u003eCLICK HERE FOR INSTALL VIDEO!\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eBase Cylinder Head Kit Includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eHead\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eDome\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eO-Ring Kit (3 pieces)\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eCopper Washer Kit\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eInstallation Instru
336ctions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eBenefits compared to stock:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Optimized performance: more power where you need it, when you need it\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Choose between 3 dome insert options. Order one, two, or all 3 to unlock full control over the feel of your engine. Each dome offers very different power delivery characteristics!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Increased detonation resistance: more efficient combustion gains performance while also increasing reliability\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Better cooling: targeted heat removal where itâs most needed, giving further reliability gains\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Cleaner, more consistent jetting\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Reduced fuel consumption\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eDomes A and B are safe to run on 91+ octane (AKI) pump fuel. Dome C may require 93+ octane for riders staying in higher rpm for longer periods of time. While each dome varies in\u003cspan class=\"Apple-converted-space\"\u003e \u003c\/span\u003ecompression ratio, they each have chamber geometry optimized for specific power delivery profiles. Please refer to the descriptions below to decide what will best suit you and your riding! Domes D and E provide the most peak power and require high octane fuel to prevent detonation. See specifications and power descriptions below.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome A (low compression\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e Low end improvement compared to stock with a linear feeling mid range into a free-revving top end. The most friendly to ride but not lacking in torque or response. Great for beginner riders but plenty of fun for experienced riders too! Offers great control of traction in slick conditions.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome B (mid compression\u003cmeta charset=\"utf-8\"\u003e\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e \u003cmeta charset=\"utf-8\"\u003eLow end improvement compared to stock with a quick ramp into strong top end pull. Slight bottom end torque increase from Dome A with a quicker revving and harder hitting power band compared to dome A. For the rider that keeps it at wide open.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome C (high compression\u003cmeta charset=\"utf-8\"\u003e\/91+ octane***):\u003c\/strong\u003e\u003c\/span\u003e Luggable low end with a broad mid range. Offers the most low end torque and peak power. Snappy and \"connected with throttle\" feel. Yeah, this one pulls hard! ***Higher octane fuel may required for faster riders*** \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome D (high compression\/100+ octane):\u003c\/strong\u003e\u003c\/span\u003e COMING SOON! Similar power curve to Dome C but MORE power across the rev range! 100+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome E (high compression\/110+ octane):\u003c\/strong\u003e\u003c\/span\u003e COMING SOON! \u003cmeta charset=\"utf-8\"\u003eSimilar power curve to Dome C\/D but EVEN MORE power across the rev range! 110+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Moto strongly recommend hiring professional help for installation. \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Moto are not responsible for any injury or damages resulting from use or installation of this product.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eReturn Policy: Returns of unused and undamaged items will be accepted within 30 days of the shipping date. When items are returned and inspected, a refund will be submitted, less the cost of shipping and a 20% restocking fee.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Jetting-Chart-YZ125-2005-2022_c6d2f1fa-9bd9-4758-9333-5542bce60067.jpg?v=1782243300\" alt=\"\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Jetting-Chart-YZ125-2023_0976daa1-6257-4326-9774-2f568f3ef32b.jpg?v=1782243257\"\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Screenshot_2026-05-10_at_7.40.58_PM.png?v=1778456472\"\u003e\u003c\/p\u003e","published_at":"2026-05-10T18:20:41-04:00","created_at":"2026-05-10T15:58:22-04:00","vendor":"DRT","type":"Cylinder 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Proudly designed and manufactured in the United States!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eFitment:\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eYAMAHA YZ125 2005+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003eYAMAHA YZ125X 2020+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003ca rel=\"noopener\" title=\"DRT Cylinder Head Install Tutorial\" href=\"https:\/\/www.youtube.com\/watch?v=mUKkQuCiHk4\" target=\"_blank\"\u003eCLICK HERE FOR INSTALL VIDEO!\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eBase Cylinder Head Kit Includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eHead\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eDome\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eO-Ring Kit (3 pieces)\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eCopper Washer Kit\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eInstallation Instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eBenefits compared to stock:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Optimized performance: more power where you need it, when you need it\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Choose between 3 dome insert options. Order one, two, or all 3 to unlock full control over the feel of your engine. Each dome offers very different power delivery characteristics!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Increased detonation resistance: more efficient combustion gains performance while also increasing reliability\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Better cooling: targeted heat removal where itâs most needed, giving further reliability gains\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Cleaner, more consistent jetting\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Reduced fuel consumption\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eDomes A and B are safe to run on 91+ octane (AKI) pump fuel. Dome C may require 93+ octane for riders staying in higher rpm for longer periods of time. While each dome varies in\u003cspan class=\"Apple-converted-space\"\u003e \u003c\/span\u003ecompression ratio, they each have chamber geometry optimized for specific power delivery profiles. Please refer to the descriptions below to decide what will best suit you and your riding! Domes D and E provide the most peak power and require high octane fuel to prevent detonation. See specifications and power descriptions below.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome A (low compression\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e Low end improvement compared to stock with a linear feeling mid range into a free-revving top end. The most friendly to ride but not lacking in torque or response. Great for beginner riders but plenty of fun for experienced riders too! Offers great control of traction in slick conditions.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome B (mid compression\u003cmeta charset=\"utf-8\"\u003e\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e \u003cmeta charset=\"utf-8\"\u003eLow end improvement compared to stock with a quick ramp into strong top end pull. Slight bottom end torque increase from Dome A with a quicker revving and harder hitting power band compared to dome A. For the rider that keeps it at wide open.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome C (high compression\u003cmeta charset=\"utf-8\"\u003e\/91+ octane***):\u003c\/strong\u003e\u003c\/span\u003e Luggable low end with a broad mid range. Offers the most low end torque and peak power. Snappy and \"connected with throttle\" feel. Yeah, this one pulls hard! ***Higher octane fuel may required for faster riders*** \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome D (high compression\/100+ octane):\u003c\/strong\u003e\u003c\/span\u003e COMING SOON! Similar power curve to Dome C but MORE power across the rev range! 100+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome E (high compression\/110+ octane):\u003c\/strong\u003e\u003c\/span\u003e COMING SOON! \u003cmeta charset=\"utf-8\"\u003eSimilar power curve to Dome C\/D but EVEN MORE power across the rev range! 110+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Moto strongly recommend hiring professional help for installation. \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Moto are not responsible for any injury or damages resulting from use or installation of this product.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eReturn Policy: Returns of unused and undamaged items will be accepted within 30 days of the shipping date. When items are returned and inspected, a refund will be submitted, less the cost of shipping and a 20% restocking fee.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Jetting-Chart-YZ125-2005-2022_c6d2f1fa-9bd9-4758-9333-5542bce60067.jpg?v=1782243300\" alt=\"\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Jetting-Chart-YZ125-2023_0976daa1-6257-4326-9774-2f568f3ef32b.jpg?v=1782243257\"\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Screenshot_2026-05-10_at_7.40.58_PM.png?v=1778456472\"\u003e\u003c\/p\u003e"}; 337 var bold_rp =[{}]; 338 if(boldTempProduct){ 339 window.BOLD.common.Shopify.saveProduct(boldTempProduct.handle, boldTempProduct.id); 340 for (var boldIndex = 0; boldTempProduct && boldIndex < boldTempProduct.variants.length; boldIndex = boldIndex + 1){ 341 var rp_group_id = bold_rp[boldIndex].rp_group_id ? 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1003 <span id="productPrice" class="h1"> 1004 1005 1006 1007 1008 1009 1010 1011 1012<small> 280<sup>00</sup></small> 1013 </span> 1014 </li> 1015 1016 1017 </ul> 1018 1019 <hr id="variantBreak" class="hr--clear hr--small"> 1020 1021 <link itemprop="availability" href="http://schema.org/InStock"> 1022 1023 <form action="/cart/add" method="post" enctype="multipart/form-data" id="addToCartForm"> 1024 <select name="id" id="productSelect" class="product-variants"> 1025 1026 1027 1028 <option selected="selected" data-sku="" value="44565392162919">Default Title - $ 280.00 USD</option> 1029 1030 1031 1032 </select> 1033 1034 1035 1036 <button type="submit" name="add" id="addToCart" class="btn"> 1037 <span class="icon icon-cart"></span> 1038 <span id="addToCartText">Add to Cart</span> 1039 </button> 1040 1041 <span id="variantQuantity" class="variant-quantity"></span> 1042 1043 </form> 1044 1045 <hr> 1046 1047 </div> 1048 1049 <div class="product-description rte" itemprop="description"> 1050 <p class="p1">DRT Cylinder Head Kit YAMAHA YZ125(X) 2005+</p> 1051<p class="p1"><meta charset="utf-8">DRT cylinder heads are the cutting edge of cylinder head design, offering optimized performance for every riding style. Proudly designed and manufactured in the United States!</p> 1052<p class="p1">Fitment:</p> 1053<p class="p1">YAMAHA YZ125 2005+</p> 1054<p class="p1"><meta charset="utf-8">YAMAHA YZ125X 2020+</p> 1055<p class="p1"><meta charset="utf-8"><a rel="noopener" title="DRT Cylinder Head Install Tutorial" href="https://www.youtube.com/watch?v=mUKkQuCiHk4" target="_blank">CLICK HERE FOR INSTALL VIDEO!</a></p> 1056<p class="p1">Base Cylinder Head Kit Includes:</p> 1057<ul> 1058<li class="p1">Head</li> 1059<li class="p1">Dome</li> 1060<li class="p1">O-Ring Kit (3 pieces)</li> 1061<li class="p1">Copper Washer Kit</li> 1062<li class="p1">Installation Instructions</li> 1063</ul> 1064<p class="p1">Â </p> 1065<p class="p1"><strong>Benefits compared to stock:</strong></p> 1066<p class="p1">-Optimized performance: more power where you need it, when you need it</p> 1067<p class="p1">-Choose between 3 dome insert options. Order one, two, or all 3 to unlock full control over the feel of your engine. Each dome offers very different power delivery characteristics!</p> 1068<p class="p1">-Increased detonation resistance: more efficient combustion gains performance while also increasing reliability</p> 1069<p class="p1">-Better cooling: targeted heat removal where itâs most needed, giving further reliability gains</p> 1070<p class="p1">-Cleaner, more consistent jetting</p> 1071<p class="p1">-Reduced fuel consumption</p> 1072<p class="p1">Â </p> 1073<p class="p1">Domes A and B are safe to run on 91+ octane (AKI) pump fuel. Dome C may require 93+ octane for riders staying in higher rpm for longer periods of time. While each dome varies in<span class="Apple-converted-space">Â </span>compression ratio, they each have chamber geometry optimized for specific power delivery profiles. Please refer to the descriptions below to decide what will best suit you and your riding! Domes D and E provide the most peak power and require high octane fuel to prevent detonation. See specifications and power descriptions below.</p> 1074<p class="p1">Â </p> 1075<p class="p1"><span style="text-decoration: underline;"><strong>Dome A (low compression/91+ octane):</strong></span> Low end improvement compared to stock with a linear feeling mid range into a free-revving top end. The most friendly to ride but not lacking in torque or response. Great for beginner riders but plenty of fun for experienced riders too! Offers great control of traction in slick conditions.</p> 1076<p class="p1"><span style="text-decoration: underline;"><strong>Dome B (mid compression<meta charset="utf-8">/91+ octane):</strong></span> <meta charset="utf-8">Low end improvement compared to stock with a quick ramp into strong top end pull. Slight bottom end torque increase from Dome A with a quicker revving and harder hitting power band compared to dome A. For the rider that keeps it at wide open.</p> 1077<p class="p1"><span style="text-decoration: underline;"><strong>Dome C (high compression<meta charset="utf-8">/91+ octane***):</strong></span> Luggable low end with a broad mid range. Offers the most low end torque and peak power. Snappy and "connected with throttle" feel. Yeah, this one pulls hard! ***Higher octane fuel may required for faster riders***Â </p> 1078<p class="p1"><span style="text-decoration: underline;"><strong>Dome D (high compression/100+ octane):</strong></span> COMING SOON! Similar power curve to Dome C but MORE power across the rev range! 100+ octane required to prevent detonation.</p> 1079<p class="p1"><span style="text-decoration: underline;"><strong>Dome E (high compression/110+ octane):</strong></span> COMING SOON! <meta charset="utf-8">
1079Similar power curve to Dome C/D but EVEN MORE power across the rev range! 110+ octane required to prevent detonation.</p> 1080<p class="p1">Â </p> 1081<p class="p1"><em><span style="text-decoration: underline;"><strong><span style="color: rgb(249, 1, 1); text-decoration: underline;">DRT and BeRAD Moto strongly recommend hiring professional help for installation. </span></strong></span></em></p> 1082<p class="p1"><em><span style="text-decoration: underline;"><strong><span style="color: rgb(249, 1, 1); text-decoration: underline;">DRT and BeRAD Moto are not responsible for any injury or damages resulting from use or installation of this product.</span></strong></span></em></p> 1083<p class="p1">Return Policy: Returns of unused and undamaged items will be accepted within 30 days of the shipping date. When items are returned and inspected, a refund will be submitted, less the cost of shipping and a 20% restocking fee.</p> 1084<p class="p1"><img src="https://cdn.shopify.com/s/files/1/1056/5310/files/Jetting-Chart-YZ125-2005-2022_c6d2f1fa-9bd9-4758-9333-5542bce60067.jpg?v=1782243300" alt=""><img alt="" src="https://cdn.shopify.com/s/files/1/1056/5310/files/Jetting-Chart-YZ125-2023_0976daa1-6257-4326-9774-2f568f3ef32b.jpg?v=1782243257"></p> 1085<p class="p1"><img><img alt="" src="https://cdn.shopify.com/s/files/1/1056/5310/files/Screenshot_2026-05-10_at_7.40.58_PM.png?v=1778456472"></p> 1086 </div> 1087 1088 1089 1090 1091 1092 1093<div class="social-sharing is-default" data-permalink="https://berad-products.myshopify.com/products/drt-cylinder-head-kit-yamaha-yz125x-2005"> 1094 1095 1096 <a target="_blank" href="//www.facebook.com/sharer.php?u=https://berad-products.myshopify.com/products/drt-cylinder-head-kit-yamaha-yz125x-2005" class="share-facebook"> 1097 <span class="icon icon-facebook"></span> 1098 <span class="share-title">Share</span> 1099 1100 <span class="share-count">0</span> 1101 1102 </a> 1103 1104 1105 1106 <a target="_blank" href="//twitter.com/share?text=DRT%20Cylinder%20Head%20Kit%20YAMAHA%20YZ125(X)%202005+&url=https://berad-products.myshopify.com/products/drt-cylinder-head-kit-yamaha-yz125x-2005;source=webclient" class="share-twitter"> 1107 <span class="icon icon-twitter"></span> 1108 <span class="share-title">Tweet</span> 1109 1110 <span class="share-count">0</span> 1111 1112 </a> 1113 1114 1115 1116 1117 1118 <a target="_blank" href="//pinterest.com/pin/create/button/?url=https://berad-products.myshopify.com/products/drt-cylinder-head-kit-yamaha-yz125x-2005&media=http://berad-products.myshopify.com/cdn/shop/files/DRT-HD842-R1-BLUE-DOME_1024x1024.jpg?v=1778905733&description=DRT%20Cylinder%20Head%20Kit%20YAMAHA%20YZ125(X)%202005+" class="share-pinterest"> 1119 <span class="icon icon-pinterest"></span> 1120 <span class="share-title">Pin it</span> 1121 1122 <span class="share-count">0</span> 1123 1124 </a> 1125 1126 1127 1128 <a target="_blank" href="//fancy.com/fancyit?ItemURL=https://berad-products.myshopify.com/products/drt-cylinder-head-kit-yamaha-yz125x-2005&Title=DRT%20Cylinder%20Head%20Kit%20YAMAHA%20YZ125(X)%202005+&Category=Other&ImageURL=//berad-products.myshopify.com/cdn/shop/files/DRT-HD842-R1-BLUE-DOME_1024x1024.jpg?v=1778905733" class="share-fancy"> 1129 <span class="icon icon-fancy"></span> 1130 <span class="share-title">Fancy</span> 1131 </a> 1132 1133 1134 1135 1136 1137 <a target="_blank" href="//plus.google.com/share?url=https://berad-products.myshopify.com/products/drt-cylinder-head-kit-yamaha-yz125x-2005" class="share-google"> 1138 <!-- Cannot get Google+ share count with JS yet --> 1139 <span class="icon icon-google"></span> 1140 1141 <span class="share-count">+1</span> 1142 1143 </a> 1144 1145 1146</div> 1147 1148 1149 1150 </div> 1151</div> 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 <hr> 1162 <span class="h1">We Also Recommend</span> 1163 <div class="grid-uniform"> 1164 1165 1166
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1203pace\"\u003e \u003c\/span\u003ecompression ratio, they each have chamber geometry optimized for specific power delivery profiles. Please refer to the descriptions below to decide what will best suit you and your riding! Domes D and E provide the most peak power and require high octane fuel to prevent detonation. See specifications and power descriptions below.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome A (low compression\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e Low end improvement compared to stock with a linear feeling mid range into a free-revving top end. The most friendly to ride but not lacking in torque or response. Great for beginner riders but plenty of fun for experienced riders too! Offers great control of traction in slick conditions.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome B (mid compression\u003cmeta charset=\"utf-8\"\u003e\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e \u003cmeta charset=\"utf-8\"\u003eLow end improvement compared to stock with a quick ramp into strong top end pull. Slight bottom end torque increase from Dome A with a quicker revving and harder hitting power band compared to dome A. For the rider that keeps it at wide open.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome C (high compression\u003cmeta charset=\"utf-8\"\u003e\/91+ octane***):\u003c\/strong\u003e\u003c\/span\u003e Luggable low end with a broad mid range. Offers the most low end torque and peak power. Snappy and \"connected with throttle\" feel. Yeah, this one pulls hard! ***Higher octane fuel may required for faster riders*** \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome D (high compression\/100+ octane):\u003c\/strong\u003e\u003c\/span\u003e COMING SOON! Similar power curve to Dome C but MORE power across the rev range! 100+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome E (high compression\/110+ octane):\u003c\/strong\u003e\u003c\/span\u003e COMING SOON! \u003cmeta charset=\"utf-8\"\u003eSimilar power curve to Dome C\/D but EVEN MORE power across the rev range! 110+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Moto strongly recommend hiring professional help for installation. \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Moto are not responsible for any injury or damages resulting from use or installation of this product.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eReturn Policy: Returns of unused and undamaged items will be accepted within 30 days of the shipping date. When items are returned and inspected, a refund will be submitted, less the cost of shipping and a 20% restocking fee.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Jetting-Chart-YZ125-2005-2022_c6d2f1fa-9bd9-4758-9333-5542bce60067.jpg?v=1782243300\" alt=\"\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Jetting-Chart-YZ125-2023_0976daa1-6257-4326-9774-2f568f3ef32b.jpg?v=1782243257\"\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Screenshot_2026-05-10_at_7.40.58_PM.png?v=1778456472\"\u003e\u003c\/p\u003e", 1204 "published_at":"2026-05-10T18:20:41", 1205 "created_at":"2026-05-10T15:58:22", 1206 "vendor":"DRT", 1207 "type":"Cylinder Head", 1208 "tags":["yamaha"], 1209 "price":28000, 1210 "price_min":28000, 1211 "price_max":28000, 1212 "price_varies":false, 1213 "compare_at_price":null, 1214 "compare_at_price_min":0, 1215 "compare_at_price_max":0, 1216 "compare_at_price_varies":false, 1217 "all_variant_ids":[44565392162919], 1218 "variants":[{"id":44565392162919,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"DRT Cylinder Head Kit YAMAHA YZ125(X) 2005+","public_title":null,"options":["Default Title"],"price":28000,"weight":499,"compare_at_price":null,"inventory_quantity":-27,"inventory_management":null,"inventory_policy":"deny","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}], 1219 "available":null,"images":["\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-BLUE-DOME.jpg?v=1778905733","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-RAW-DOME.jpg?v=1778905733","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1A.jpg?v=1778905733","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1B.jpg?v=1778905733","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1C.jpg?v=1778905733","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-INSIDE-BLUE.jpg?v=1779303420","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-INSIDE-DOME.jpg?v=1779303420","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-LOGO-BLUE.jpg?v=1779303420","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-LOGO-RAW.jpg?v=1779303420","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-CW842_5.jpg?v=1779303371","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-OR842.jpg?v=1779303419","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-YZ125-Box.jpg?v=1779303420","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRTLogoBlack.png?v=1766651679","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/Jetting-Chart-YZ125-2005-2022.jpg?v=1779311370","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/Jetting-Chart-YZ125-2023.jpg?v=1779311370","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/Squish_Chart.png?v=1779311371","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_STOCK_X.jpg?v=1784495124","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_A.jpg?v=1784495124","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_STOCK_MOTO.jpg?v=1784495124","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_B.jpg?v=1784495124","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_C.jpg?v=1784495124","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_D.jpg?v=1784495124","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_E.jpg?v=1784495124"],"featured_image":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-BLUE-DOME.jpg?v=1778905733", 1220 "options":["Title"], 1221 "url":"\/products\/drt-cylinder-head-kit-yamaha-yz125x-2005"};var boldCSPMetafields = {}; 1222 var boldTempProduct ={"id":7621422415975,"title":"DRT Cylinder Head Kit YAMAHA YZ125(X) 2005+","handle":"drt-cylinder-head-kit-yamaha-yz125x-2005","description":"\u003cp class=\"p1\"\u003eDRT Cylinder Head Kit YAMAHA YZ125(X) 2005+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003eDRT cylinder heads are the cutting edge of cylinder head design, offering optimized performance for every riding style. Proudly designed and manufactured in the United States!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eFitment:\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eYAMAHA YZ125 2005+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003eYAMAHA YZ125X 2020+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003ca rel=\"noopener\" title=\"DRT Cylinder Head Install Tutorial\" href=\"https:\/\/www.youtube.com\/watch?v=mUKkQuCiHk4\" target=\"_blank\"\u003eCLICK HERE FOR INSTALL VIDEO!\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eBase Cylinder Head Kit Includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eHead\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eDome\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eO-Ring Kit (3 pieces)\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eCopper Washer Kit\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eInstallation Instru
1222ctions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eBenefits compared to stock:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Optimized performance: more power where you need it, when you need it\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Choose between 3 dome insert options. Order one, two, or all 3 to unlock full control over the feel of your engine. Each dome offers very different power delivery characteristics!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Increased detonation resistance: more efficient combustion gains performance while also increasing reliability\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Better cooling: targeted heat removal where itâs most needed, giving further reliability gains\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Cleaner, more consistent jetting\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Reduced fuel consumption\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eDomes A and B are safe to run on 91+ octane (AKI) pump fuel. Dome C may require 93+ octane for riders staying in higher rpm for longer periods of time. While each dome varies in\u003cspan class=\"Apple-converted-space\"\u003e \u003c\/span\u003ecompression ratio, they each have chamber geometry optimized for specific power delivery profiles. Please refer to the descriptions below to decide what will best suit you and your riding! Domes D and E provide the most peak power and require high octane fuel to prevent detonation. See specifications and power descriptions below.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome A (low compression\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e Low end improvement compared to stock with a linear feeling mid range into a free-revving top end. The most friendly to ride but not lacking in torque or response. Great for beginner riders but plenty of fun for experienced riders too! Offers great control of traction in slick conditions.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome B (mid compression\u003cmeta charset=\"utf-8\"\u003e\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e \u003cmeta charset=\"utf-8\"\u003eLow end improvement compared to stock with a quick ramp into strong top end pull. Slight bottom end torque increase from Dome A with a quicker revving and harder hitting power band compared to dome A. For the rider that keeps it at wide open.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome C (high compression\u003cmeta charset=\"utf-8\"\u003e\/91+ octane***):\u003c\/strong\u003e\u003c\/span\u003e Luggable low end with a broad mid range. Offers the most low end torque and peak power. Snappy and \"connected with throttle\" feel. Yeah, this one pulls hard! ***Higher octane fuel may required for faster riders*** \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome D (high compression\/100+ octane):\u003c\/strong\u003e\u003c\/span\u003e COMING SOON! Similar power curve to Dome C but MORE power across the rev range! 100+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome E (high compression\/110+ octane):\u003c\/strong\u003e\u003c\/span\u003e COMING SOON! \u003cmeta charset=\"utf-8\"\u003eSimilar power curve to Dome C\/D but EVEN MORE power across the rev range! 110+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Moto strongly recommend hiring professional help for installation. \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Moto are not responsible for any injury or damages resulting from use or installation of this product.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eReturn Policy: Returns of unused and undamaged items will be accepted within 30 days of the shipping date. When items are returned and inspected, a refund will be submitted, less the cost of shipping and a 20% restocking fee.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Jetting-Chart-YZ125-2005-2022_c6d2f1fa-9bd9-4758-9333-5542bce60067.jpg?v=1782243300\" alt=\"\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Jetting-Chart-YZ125-2023_0976daa1-6257-4326-9774-2f568f3ef32b.jpg?v=1782243257\"\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Screenshot_2026-05-10_at_7.40.58_PM.png?v=1778456472\"\u003e\u003c\/p\u003e","published_at":"2026-05-10T18:20:41-04:00","created_at":"2026-05-10T15:58:22-04:00","vendor":"DRT","type":"Cylinder 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Proudly designed and manufactured in the United States!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eFitment:\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eYAMAHA YZ125 2005+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003eYAMAHA YZ125X 2020+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003ca rel=\"noopener\" title=\"DRT Cylinder Head Install Tutorial\" href=\"https:\/\/www.youtube.com\/watch?v=mUKkQuCiHk4\" target=\"_blank\"\u003eCLICK HERE FOR INSTALL VIDEO!\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eBase Cylinder Head Kit Includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eHead\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eDome\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eO-Ring Kit (3 pieces)\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eCopper Washer Kit\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eInstallation Instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eBenefits compared to stock:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Optimized performance: more power where you need it, when you need it\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Choose between 3 dome insert options. Order one, two, or all 3 to unlock full control over the feel of your engine. Each dome offers very different power delivery characteristics!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Increased detonation resistance: more efficient combustion gains performance while also increasing reliability\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Better cooling: targeted heat removal where itâs most needed, giving further reliability gains\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Cleaner, more consistent jetting\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Reduced fuel consumption\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eDomes A and B are safe to run on 91+ octane (AKI) pump fuel. Dome C may require 93+ octane for riders staying in higher rpm for longer periods of time. While each dome varies in\u003cspan class=\"Apple-converted-space\"\u003e \u003c\/span\u003ecompression ratio, they each have chamber geometry optimized for specific power delivery profiles. Please refer to the descriptions below to decide what will best suit you and your riding! Domes D and E provide the most peak power and require high octane fuel to prevent detonation. See specifications and power descriptions below.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome A (low compression\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e Low end improvement compared to stock with a linear feeling mid range into a free-revving top end. The most friendly to ride but not lacking in torque or response. Great for beginner riders but plenty of fun for experienced riders too! Offers great control of traction in slick conditions.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome B (mid compression\u003cmeta charset=\"utf-8\"\u003e\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e \u003cmeta charset=\"utf-8\"\u003eLow end improvement compared to stock with a quick ramp into strong top end pull. Slight bottom end torque increase from Dome A with a quicker revving and harder hitting power band compared to dome A. For the rider that keeps it at wide open.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome C (high compression\u003cmeta charset=\"utf-8\"\u003e\/91+ octane***):\u003c\/strong\u003e\u003c\/span\u003e Luggable low end with a broad mid range. Offers the most low end torque and peak power. Snappy and \"connected with throttle\" feel. Yeah, this one pulls hard! ***Higher octane fuel may required for faster riders*** \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome D (high compression\/100+ octane):\u003c\/strong\u003e\u003c\/span\u003e COMING SOON! Similar power curve to Dome C but MORE power across the rev range! 100+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome E (high compression\/110+ octane):\u003c\/strong\u003e\u003c\/span\u003e COMING SOON! \u003cmeta charset=\"utf-8\"\u003eSimilar power curve to Dome C\/D but EVEN MORE power across the rev range! 110+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Moto strongly recommend hiring professional help for installation. \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Moto are not responsible for any injury or damages resulting from use or installation of this product.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eReturn Policy: Returns of unused and undamaged items will be accepted within 30 days of the shipping date. When items are returned and inspected, a refund will be submitted, less the cost of shipping and a 20% restocking fee.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Jetting-Chart-YZ125-2005-2022_c6d2f1fa-9bd9-4758-9333-5542bce60067.jpg?v=1782243300\" alt=\"\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Jetting-Chart-YZ125-2023_0976daa1-6257-4326-9774-2f568f3ef32b.jpg?v=1782243257\"\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Screenshot_2026-05-10_at_7.40.58_PM.png?v=1778456472\"\u003e\u003c\/p\u003e"}; 1223 var bold_rp =[{}]; 1224 if(boldTempProduct){ 1225 window.BOLD.common.Shopify.saveProduct(boldTempProduct.handle, boldTempProduct.id); 1226 for (var boldIndex = 0; boldTempProduct && boldIndex < boldTempProduct.variants.length; boldIndex = boldIndex + 1){ 1227 var rp_group_id = bold_rp[boldIndex].rp_group_id ? 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1282pace\"\u003e \u003c\/span\u003ecompression ratio, they each have chamber geometry optimized for specific power delivery profiles. Please refer to the descriptions below to decide what will best suit you and your riding! Domes D and E provide the most peak power and require high octane fuel to prevent detonation. See specifications and power descriptions below.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome A (low compression\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e Mellow but very luggable low end with a linear feeling transition into a free-revving top end. The most friendly to ride but not lacking in torque or response. Great for beginner riders but plenty of fun for experienced riders too! Offers great control of traction in slick conditions. \u003ca href=\"https:\/\/youtu.be\/IX9omgw125M\" title=\"DRT Cylinder Head Dome A Low Compression\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eCLICK HERE FOR VIDEO REVIEW\u003c\/strong\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome B (mid compression\u003cmeta charset=\"utf-8\"\u003e\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e Luggable low end with a quick ramp into strong top end pull. Slight torque increase with quicker revving and harder hitting power band compared to dome A. Classic â250 2 strokeâ feel! For the rider that likes some spice when they get on the pipe! \u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eVIDEO REVIEW COMING SOON\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome C (high compression\u003cmeta charset=\"utf-8\"\u003e\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e Hard hitting and luggable low end with a broad mid range. Offers the most low end torque and peak power. Snappy and \"connected with throttle\" feeling power . Yeah, this one pulls hard! \u003ca href=\"https:\/\/youtu.be\/HJwL_yl2aPU\" title=\"DRT Cylinder Head Dome C High Compression\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eCLICK HERE FOR VIDEO REVIEW\u003c\/strong\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome D (high compression\/100+ octane):\u003c\/strong\u003e\u003c\/span\u003e Similar power curve to Dome C but MORE power across the rev range! 100+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome E (high compression\/110+ octane):\u003c\/strong\u003e\u003c\/span\u003e \u003cmeta charset=\"utf-8\"\u003eSimilar power curve to Dome C\/D but EVEN MORE power across the rev range! 110+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Products strongly recommend hiring professional help for installation. \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Products are not responsible for any injury or damages resulting from use or installation of this product.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eReturn Policy: Returns of unused and undamaged items will be accepted within 30 days of the shipping date. When items are returned and inspected, a refund will be submitted, less the cost of shipping and a 20% restocking fee.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Jetting-Chart-YZ250-2000.jpg?v=1779311370\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Squish_Chart.png?v=1779311371\" alt=\"\"\u003e\u003cimg\u003e\u003c\/p\u003e", 1283 "published_at":"2025-11-27T19:36:14", 1284 "created_at":"2025-11-26T23:11:26", 1285 "vendor":"DRT", 1286 "type":"Cylinder Head", 1287 "tags":["yamaha"], 1288 "price":28000, 1289 "price_min":28000, 1290 "price_max":28000, 1291 "price_varies":false, 1292 "compare_at_price":null, 1293 "compare_at_price_min":0, 1294 "compare_at_price_max":0, 1295 "compare_at_price_varies":false, 1296 "all_variant_ids":[41929795829863], 1297 "variants":[{"id":41929795829863,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"DRT Cylinder Head Kit YAMAHA YZ250(X) 1999+","public_title":null,"options":["Default Title"],"price":28000,"weight":499,"compare_at_price":null,"inventory_quantity":-155,"inventory_management":null,"inventory_policy":"deny","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}], 1298 "available":null,"images":["\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-BLUE-DOME.png?v=1766569092","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-RAW-DOME.png?v=1766569092","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-BOX.png?v=1766651606","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-DOME-A.png?v=1766651606","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-DOME-B.png?v=1766651606","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-DOME-C.png?v=1766651606","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-Copper-Washer-Kit_6_2dcd0934-8340-45ea-a6ae-496de45124ed.png?v=1766651606","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-ORing-Kit_cdce9a0a-7304-4167-9f62-79815bddef3c.png?v=1766651606","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-INSIDE-BLUE.png?v=1766651606","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-INSIDE-DOME.png?v=1766651606","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-LOGO-BLUE.png?v=1766651606","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-LOGO-RAW.png?v=1766651606","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/Screenshot2025-12-25at1.34.14AM.png?v=1766651679","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRTLogoBlack.png?v=1766651679","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ250_X_A.
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Proudly designed and manufactured in the United States!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eFitment:\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eYAMAHA YZ250 1999+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003eYAMAHA YZ250X 2016+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003ca href=\"https:\/\/www.youtube.com\/watch?v=mUKkQuCiHk4\" target=\"_blank\" title=\"DRT Cylinder Head Install Tutorial\" rel=\"noopener\"\u003eCLICK HERE FOR INSTALL VIDEO!\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eBase Cylinder Head Kit Includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eHead\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eDome\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eO-Ring Kit (3 pieces)\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eCopper Washer Kit\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eInstallation Instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eBenefits compared to stock:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Optimized performance: more power where you need it, when you need it\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Choose between 3 dome insert options. Order one, two, or all 3 to unlock full control over the feel of your engine. Each dome offers very different power delivery characteristics!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Increased detonation resistance: more efficient combustion gains performance while also increasing reliability\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Better cooling: targeted heat removal where itâs most needed, giving further reliability gains\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Cleaner, more consistent jetting\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Reduced fuel consumption\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eDomes A through C are safe to run on 91+ octane (AKI) pump fuel. While each dome varies in\u003cspan class=\"Apple-converted-space\"\u003e \u003c\/span\u003ecompression ratio, they each have chamber geometry optimized for specific power delivery profiles. Please refer to the descriptions below to decide what will best suit you and your riding! Domes D and E provide the most peak power and require high octane fuel to prevent detonation. See specifications and power descriptions below.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome A (low compression\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e Mellow but very luggable low end with a linear feeling transition into a free-revving top end. The most friendly to ride but not lacking in torque or response. Great for beginner riders but plenty of fun for experienced riders too! Offers great control of traction in slick conditions. \u003ca href=\"https:\/\/youtu.be\/IX9omgw125M\" title=\"DRT Cylinder Head Dome A Low Compression\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eCLICK HERE FOR VIDEO REVIEW\u003c\/strong\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome B (mid compression\u003cmeta charset=\"utf-8\"\u003e\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e Luggable low end with a quick ramp into strong top end pull. Slight torque increase with quicker revving and harder hitting power band compared to dome A. Classic â250 2 strokeâ feel! For the rider that likes some spice when they get on the pipe! \u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eVIDEO REVIEW COMING SOON\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome C (high compression\u003cmeta charset=\"utf-8\"\u003e\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e Hard hitting and luggable low end with a broad mid range. Offers the most low end torque and peak power. Snappy and \"connected with throttle\" feeling power . Yeah, this one pulls hard! \u003ca href=\"https:\/\/youtu.be\/HJwL_yl2aPU\" title=\"DRT Cylinder Head Dome C High Compression\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eCLICK HERE FOR VIDEO REVIEW\u003c\/strong\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome D (high compression\/100+ octane):\u003c\/strong\u003e\u003c\/span\u003e Similar power curve to Dome C but MORE power across the rev range! 100+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome E (high compression\/110+ octane):\u003c\/strong\u003e\u003c\/span\u003e \u003cmeta charset=\"utf-8\"\u003eSimilar power curve to Dome C\/D but EVEN MORE power across the rev range! 110+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Products strongly recommend hiring professional help for installation. \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Products are not responsible for any injury or damages resulting from use or installation of this product.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eReturn Policy: Returns of unused and undamaged items will be accepted within 30 days of the shipping date. When items are returned and inspected, a refund will be submitted, less the cost of shipping and a 20% restocking fee.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Jetting-Chart-YZ250-2000.jpg?v=1779311370\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Squish_Chart.png?v=1779311371\" alt=\"\"\u003e\u003cimg\u003e\u003c\/p\u003e","published_at":"2025-11-27T19:36:14-05:00","created_at":"2025-11-26T23:11:26-05:00","vendor":"DRT","type":"Cylinder Head","tags":["yamaha"],"price":28000,"price_min":28000,"price_max":28000,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":41929795829863,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"DRT Cylinder Head Kit YAMAHA YZ250(X) 1999+","public_title":null,"options":["Default Title"],"price":28000,"weight":499,"compare_at_price":null,"inventory_quantity":-155,"inventory_management":null,"inventory_policy":"deny","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-BLUE-DOME.png?v=1766569092","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-RAW-DOME.png?v=1766569092","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-BOX.png?v=1766651606","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-DOME-A.png?v=1766651606","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-DOME-B.png?v=1766651606","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-DOME-C.png?v=1766651606","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-Copper-Washer-Kit_6_2dcd0934-8340-45ea-a6ae-496de45124ed.png?v=1766651606","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-ORing-Kit_cdce9a0a-7304-4167-9f62-79815bddef3c.png?v=1766651606","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-INSIDE-BLUE.png?v=1766651606","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-INSIDE-DOME.png?v=1766651606","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-LOGO-BLUE.png?v=1766651606","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-LOGO-RAW.png?v=1766651606","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/Screenshot2025-12-25at1.34.14AM.png?v=1766651679","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRTLogoBlack.png?v=1766651679","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ250_X_A.
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1301jpg?v=1784495207"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ250_X_A.jpg?v=1784495207","width":1500},{"alt":null,"id":31030667083879,"position":16,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ250_X_STOCK_X.jpg?v=1784495207"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ250_X_STOCK_X.jpg?v=1784495207","width":1500},{"alt":null,"id":31030667149415,"position":17,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ250_X_STOCK_MOTO_2011.jpg?v=1784495207"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ250_X_STOCK_MOTO_2011.jpg?v=1784495207","width":1500},{"alt":null,"id":31030667247719,"position":18,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ250_X_B.jpg?v=1784495207"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ250_X_B.jpg?v=1784495207","width":1500},{"alt":null,"id":31030698541159,"position":19,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ250_X_STOCK_MOTO_03-10_b79c080e-a8c5-490f-82fb-27c999b676b4.jpg?v=1784496420"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ250_X_STOCK_MOTO_03-10_b79c080e-a8c5-490f-82fb-27c999b676b4.jpg?v=1784496420","width":1500},{"alt":null,"id":31030702637159,"position":20,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ250_X_C_d9df3df9-4e18-48b6-94d1-5071158bf13f.jpg?v=1784496637"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ250_X_C_d9df3df9-4e18-48b6-94d1-5071158bf13f.jpg?v=1784496637","width":1500},{"alt":null,"id":31030667214951,"position":21,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ250_X_D.jpg?v=1784495207"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ250_X_D.jpg?v=1784495207","width":1500},{"alt":null,"id":31030667116647,"position":22,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ250_X_E.jpg?v=1784495207"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ250_X_E.jpg?v=1784495207","width":1500}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp class=\"p1\"\u003eDRT Cylinder Head Kit YAMAHA YZ250(X) 1999+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003eDRT cylinder heads are the cutting edge of cylinder head design, offering optimized performance for every riding style. Proudly designed and manufactured in the United States!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eFitment:\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eYAMAHA YZ250 1999+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003eYAMAHA YZ250X 2016+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003ca href=\"https:\/\/www.youtube.com\/watch?v=mUKkQuCiHk4\" target=\"_blank\" title=\"DRT Cylinder Head Install Tutorial\" rel=\"noopener\"\u003eCLICK HERE FOR INSTALL VIDEO!\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eBase Cylinder Head Kit Includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eHead\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eDome\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eO-Ring Kit (3 pieces)\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eCopper Washer Kit\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eInstallation Instru
1301ctions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eBenefits compared to stock:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Optimized performance: more power where you need it, when you need it\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Choose between 3 dome insert options. Order one, two, or all 3 to unlock full control over the feel of your engine. Each dome offers very different power delivery characteristics!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Increased detonation resistance: more efficient combustion gains performance while also increasing reliability\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Better cooling: targeted heat removal where itâs most needed, giving further reliability gains\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Cleaner, more consistent jetting\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Reduced fuel consumption\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eDomes A through C are safe to run on 91+ octane (AKI) pump fuel. While each dome varies in\u003cspan class=\"Apple-converted-space\"\u003e \u003c\/span\u003ecompression ratio, they each have chamber geometry optimized for specific power delivery profiles. Please refer to the descriptions below to decide what will best suit you and your riding! Domes D and E provide the most peak power and require high octane fuel to prevent detonation. See specifications and power descriptions below.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome A (low compression\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e Mellow but very luggable low end with a linear feeling transition into a free-revving top end. The most friendly to ride but not lacking in torque or response. Great for beginner riders but plenty of fun for experienced riders too! Offers great control of traction in slick conditions. \u003ca href=\"https:\/\/youtu.be\/IX9omgw125M\" title=\"DRT Cylinder Head Dome A Low Compression\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eCLICK HERE FOR VIDEO REVIEW\u003c\/strong\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome B (mid compression\u003cmeta charset=\"utf-8\"\u003e\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e Luggable low end with a quick ramp into strong top end pull. Slight torque increase with quicker revving and harder hitting power band compared to dome A. Classic â250 2 strokeâ feel! For the rider that likes some spice when they get on the pipe! \u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eVIDEO REVIEW COMING SOON\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome C (high compression\u003cmeta charset=\"utf-8\"\u003e\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e Hard hitting and luggable low end with a broad mid range. Offers the most low end torque and peak power. Snappy and \"connected with throttle\" feeling power . Yeah, this one pulls hard! \u003ca href=\"https:\/\/youtu.be\/HJwL_yl2aPU\" title=\"DRT Cylinder Head Dome C High Compression\" rel=\"noopener\" target=\"_blank\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eCLICK HERE FOR VIDEO REVIEW\u003c\/strong\u003e\u003c\/span\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome D (high compression\/100+ octane):\u003c\/strong\u003e\u003c\/span\u003e Similar power curve to Dome C but MORE power across the rev range! 100+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome E (high compression\/110+ octane):\u003c\/strong\u003e\u003c\/span\u003e \u003cmeta charset=\"utf-8\"\u003eSimilar power curve to Dome C\/D but EVEN MORE power across the rev range! 110+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Products strongly recommend hiring professional help for installation. \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Products are not responsible for any injury or damages resulting from use or installation of this product.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eReturn Policy: Returns of unused and undamaged items will be accepted within 30 days of the shipping date. When items are returned and inspected, a refund will be submitted, less the cost of shipping and a 20% restocking fee.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Jetting-Chart-YZ250-2000.jpg?v=1779311370\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Squish_Chart.png?v=1779311371\" alt=\"\"\u003e\u003cimg\u003e\u003c\/p\u003e"}; 1302 var bold_rp =[{}]; 1303 if(boldTempProduct){ 1304 window.BOLD.common.Shopify.saveProduct(boldTempProduct.handle, boldTempProduct.id); 1305 for (var boldIndex = 0; boldTempProduct && boldIndex < boldTempProduct.variants.length; boldIndex = boldIndex + 1){ 1306 var rp_group_id = bold_rp[boldIndex].rp_group_id ? '' + bold_rp[boldIndex].rp_group_id : ''; 1307 window.BOLD.common.Shopify.saveVariant( 1308 boldTempProduct.variants[boldIndex].id, 1309 { 1310 product_id: boldTempProduct.id, 1311 product_handle: boldTempProduct.handle, 1312 price: boldTempProduct.variants[boldIndex].price, 1313 group_id: rp_group_id, 1314 csp_metafield: boldCSPMetafields[boldTempProduct.variants[boldIndex].id] 1315 } 1316 ); 1317 } 1318 } 1319 1320 currentScript.parentNode.removeChild(currentScript); 1321 </script>
1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336<div class="grid-item large--one-fifth medium--one-third small--one-half"> 1337 1338 <a href="/collections/beradsbest/products/drt-cylinder-head-kit-yamaha-yz250x-1999" class="product-grid-item"> 1339 <div class="product-grid-image"> 1340 <div class="product-grid-image--centered"> 1341 1342 <img src="//berad-products.myshopify.com/cdn/shop/files/DRT-HD768-R1-BLUE-DOME_large.png?v=1766569092" alt="DRT Cylinder Head Kit YAMAHA YZ250(X) 1999+"> 1343 </div> 1344 </div> 1345 1346 <p>DRT Cylinder Head Kit YAMAHA YZ250(X) 1999+</p> 1347 1348 <div class="product-item--price"> 1349 <span class="h1 medium--left"> 1350 1351 1352 1353 1354 1355 1356 1357 1358<small> 280<sup>00</sup></small> 1359 </span> 1360 1361 1362 </div> 1363 1364 1365 </a> 1366 1367</div> 1368 1369 1370 1371
1372<script> 1373 var currentScript = document.currentScript || document.scripts[document.scripts.length - 1]; 1374 var boldVariantIds =[43770098548839]; 1375 var boldProductHandle ="drt-cylinder-head-dome-insert-only-yamaha-yz125x-2005"; 1376 var BOLD = BOLD || {}; 1377 BOLD.products = BOLD.products || {}; 1378 BOLD.variant_lookup = BOLD.variant_lookup || {}; 1379 if (window.BOLD && !BOLD.common) { 1380 BOLD.common = BOLD.common || {}; 1381 BOLD.common.Shopify = BOLD.common.Shopify || {}; 1382 window.BOLD.common.Shopify.products = window.BOLD.common.Shopify.products || {}; 1383 window.BOLD.common.Shopify.variants = window.BOLD.common.Shopify.variants || {}; 1384 window.BOLD.common.Shopify.handles = window.BOLD.common.Shopify.handles || {}; 1385 window.BOLD.common.Shopify.saveProduct = function (handle, product) { 1386 if (typeof handle === 'string' && typeof window.BOLD.common.Shopify.products[handle] === 'undefined') { 1387 if (typeof product === 'number') { 1388 window.BOLD.common.Shopify.handles[product] = handle; 1389 product = { id: product }; 1390 } 1391 window.BOLD.common.Shopify.products[handle] = product; 1392 } 1393 }; 1394 window.BOLD.common.Shopify.saveVariant = function (variant_id, variant) { 1395 if (typeof variant_id === 'number' && typeof window.BOLD.common.Shopify.variants[variant_id] === 'undefined') { 1396 window.BOLD.common.Shopify.variants[variant_id] = variant; 1397 } 1398 }; 1399 } 1400 1401 for (var boldIndex = 0; boldIndex < boldVariantIds.length; boldIndex = boldIndex + 1) { 1402 BOLD.variant_lookup[boldVariantIds[boldIndex]] = boldProductHandle; 1403 } 1404 1405 BOLD.products[boldProductHandle] ={ 1406 "id":7625998434407, 1407 "title":"DRT Cylinder Head Dome Insert ONLY - YAMAHA YZ125(X) 2005+","handle":"drt-cylinder-head-dome-insert-only-yamaha-yz125x-2005", 1408 "description":"\u003cp\u003eDRT Cylinder Head Dome Insert Yamaha YZ125(X) 2005+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eDRT cylinder heads are the cutting edge of cylinder head design, offering optimized performance for every riding style. Proudly designed and manufactured in the United States!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eBenefits compared to stock:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Optimized performance: more power where you need it, when you need it\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Choose between 3 dome insert options. Order one, two, or all 3 to unlock full control over the feel of your engine. Each dome offers very different power delivery characteristics!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Increased detonation resistance: more efficient combustion gains performance while also increasing reliability\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Better cooling: targeted heat removal where itâs most needed, giving further reliability gains\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Cleaner, more consistent jetting\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Reduced fuel consumption\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eDomes A and B are safe to run on 91+ octane (AKI) pump fuel. Dome C may require 93+ octane for riders staying in higher rpm for longer periods of time. While each dome varies in\u003cspan class=\"Apple-converted-space\"\u003e \u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003ecompression ratio, they each have chamber geometry optimized for specific power delivery profiles. Please refer to the descriptions below to decide what will best suit you and your riding! Domes D and E provide the most peak power and require high octane fuel to prevent detonation. See specifications and power descriptions below.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan\u003e\u003cstrong\u003eDome A (low compression\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eLow end improvement compared to stock with a linear feeling mid range into a free-revving top end. The most friendly to ride but not lacking in torque or response. Great for beginner riders but plenty of fun for experienced riders too! Offers great control of traction in slick conditions.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan\u003e\u003cstrong\u003eDome B (mid compression\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eLow end improvement compared to stock with a quick ramp into strong top end pull. Slight bottom end torque increase from Dome A with a quicker revving and harder hitting power band compared to dome A. For the rider that keeps it at wide open.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan\u003e\u003cstrong\u003eDome C (high compression\/91+ octane***):\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eLuggable low end with a broad mid range. Offers the most low end torque and peak power. Snappy and \"connected with throttle\" feel. Yeah, this one pulls hard! ***Higher octane fuel may required for faster riders*** \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan\u003e\u003cstrong\u003eDome D (high compression\/100+ octane):\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eCOMING SOON! Similar power curve to Dome C but MORE power across the rev range! 100+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan\u003e\u003cstrong\u003eDome E (high compression\/110+ octane):\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eCOMING SOON!\u003cspan\u003e \u003c\/span\u003eSimilar power curve to Dome C\/D but EVEN MORE power across the rev range! 110+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cem\u003e\u003cstrong\u003eDRT and BeRAD Moto strongly recommend hiring professional help for installation.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cem\u003e\u003cstrong\u003eDRT and BeRAD Moto are not responsible for any injury or damages resulting from use or installation of this product.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eReturn Policy: Returns of unused and undamaged items will be accepted within 30 days of the shipping date. 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Similar power curve to Dome C but MORE power across the rev range! 100+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan\u003e\u003cstrong\u003eDome E (high compression\/110+ octane):\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eCOMING SOON!\u003cspan\u003e \u003c\/span\u003eSimilar power curve to Dome C\/D but EVEN MORE power across the rev range! 110+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cem\u003e\u003cstrong\u003eDRT and BeRAD Moto strongly recommend hiring professional help for installation.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cem\u003e\u003cstrong\u003eDRT and BeRAD Moto are not responsible for any injury or damages resulting from use or installation of this product.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eReturn Policy: Returns of unused and undamaged items will be accepted within 30 days of the shipping date. When items are returned and inspected, a refund will be submitted, less the cost of shipping and a 20% restocking fee.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Screenshot_2026-05-10_at_5.38.05_PM.png?v=1778449099\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Screenshot_2026-05-10_at_5.37.41_PM.png?v=1778449099\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Screenshot_2026-05-10_at_7.40.58_PM.png?v=1778456472\" alt=\"\"\u003e\u003c\/p\u003e","published_at":"2026-05-16T00:42:08-04:00","created_at":"2026-05-16T00:37:51-04:00","vendor":"DRT","type":"Cylinder Head","tags":["DRT","yamaha"],"price":11000,"price_min":11000,"price_max":11000,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":43770098548839,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"DRT Cylinder Head Dome Insert ONLY - YAMAHA YZ125(X) 2005+","public_title":null,"options":["Default Title"],"price":11000,"weight":122,"compare_at_price":null,"inventory_quantity":-1,"inventory_management":null,"inventory_policy":"deny","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1A.jpg?v=1778905733","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1B.jpg?v=1778905733","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1C.jpg?v=1778905733"],"featured_image":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1A.jpg?v=1778905733","options":["Title"],"media":[{"alt":null,"id":30667735203943,"position":1,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1A.jpg?v=1778905733"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1A.jpg?v=1778905733","width":1500},{"alt":null,"id":30667735171175,"position":2,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1B.jpg?v=1778905733"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1B.jpg?v=1778905733","width":1500},{"alt":null,"id":30667735138407,"position":3,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1C.jpg?v=1778905733"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1C.jpg?v=1778905733","width":1500}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp\u003eDRT Cylinder Head Dome Insert Yamaha YZ125(X) 2005+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eDRT cylinder heads are the cutting edge of cylinder head design, offering optimized performance for every riding style. Proudly designed and manufactured in the United States!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eBenefits compared to stock:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Optimized performance: more power where you need it, when you need it\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Choose between 3 dome insert options. Order one, two, or all 3 to unlock full control over the feel of your engine. Each dome offers very different power delivery characteristics!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Increased detonation resistance: more efficient combustion gains performance while also increasing reliability\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Better cooling: targeted heat removal where itâs most needed, giving further reliability gains\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Cleaner, more consistent jetting\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Reduced fuel consumption\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eDomes A and B are safe to run on 91+ octane (AKI) pump fuel. Dome C may require 93+ octane for riders staying in higher rpm for longer periods of time. While each dome varies in\u003cspan class=\"Apple-converted-s
1427pace\"\u003e \u003cspan\u003e \u003c\/span\u003e\u003c\/span\u003ecompression ratio, they each have chamber geometry optimized for specific power delivery profiles. Please refer to the descriptions below to decide what will best suit you and your riding! Domes D and E provide the most peak power and require high octane fuel to prevent detonation. See specifications and power descriptions below.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan\u003e\u003cstrong\u003eDome A (low compression\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eLow end improvement compared to stock with a linear feeling mid range into a free-revving top end. The most friendly to ride but not lacking in torque or response. Great for beginner riders but plenty of fun for experienced riders too! Offers great control of traction in slick conditions.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan\u003e\u003cstrong\u003eDome B (mid compression\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eLow end improvement compared to stock with a quick ramp into strong top end pull. Slight bottom end torque increase from Dome A with a quicker revving and harder hitting power band compared to dome A. For the rider that keeps it at wide open.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan\u003e\u003cstrong\u003eDome C (high compression\/91+ octane***):\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eLuggable low end with a broad mid range. Offers the most low end torque and peak power. Snappy and \"connected with throttle\" feel. Yeah, this one pulls hard! ***Higher octane fuel may required for faster riders*** \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan\u003e\u003cstrong\u003eDome D (high compression\/100+ octane):\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eCOMING SOON! Similar power curve to Dome C but MORE power across the rev range! 100+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan\u003e\u003cstrong\u003eDome E (high compression\/110+ octane):\u003c\/strong\u003e\u003c\/span\u003e\u003cspan\u003e \u003c\/span\u003eCOMING SOON!\u003cspan\u003e \u003c\/span\u003eSimilar power curve to Dome C\/D but EVEN MORE power across the rev range! 110+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cem\u003e\u003cstrong\u003eDRT and BeRAD Moto strongly recommend hiring professional help for installation.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"color: rgb(255, 42, 0);\"\u003e\u003cem\u003e\u003cstrong\u003eDRT and BeRAD Moto are not responsible for any injury or damages resulting from use or installation of this product.\u003c\/strong\u003e\u003c\/em\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eReturn Policy: Returns of unused and undamaged items will be accepted within 30 days of the shipping date. When items are returned and inspected, a refund will be submitted, less the cost of shipping and a 20% restocking fee.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Screenshot_2026-05-10_at_5.38.05_PM.png?v=1778449099\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Screenshot_2026-05-10_at_5.37.41_PM.png?v=1778449099\" alt=\"\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Screenshot_2026-05-10_at_7.40.58_PM.png?v=1778456472\" alt=\"\"\u003e\u003c\/p\u003e"}; 1428 var bold_rp =[{}]; 1429 if(boldTempProduct){ 1430 window.BOLD.common.Shopify.saveProduct(boldTempProduct.handle, boldTempProduct.id); 1431 for (var boldIndex = 0; boldTempProduct && boldIndex < boldTempProduct.variants.length; boldIndex = boldIndex + 1){ 1432 var rp_group_id = bold_rp[boldIndex].rp_group_id ? '' + bold_rp[boldIndex].rp_group_id : ''; 1433 window.BOLD.common.Shopify.saveVariant( 1434 boldTempProduct.variants[boldIndex].id, 1435 { 1436 product_id: boldTempProduct.id, 1437 product_handle: boldTempProduct.handle, 1438 price: boldTempProduct.variants[boldIndex].price, 1439 group_id: rp_group_id, 1440 csp_metafield: boldCSPMetafields[boldTempProduct.variants[boldIndex].id] 1441 } 1442 ); 1443 } 1444 } 1445 1446 currentScript.parentNode.removeChild(currentScript); 1447 </script>
1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462<div class="grid-item large--one-fifth medium--one-third small--one-half"> 1463 1464 <a href="/collections/beradsbest/products/drt-cylinder-head-dome-insert-only-yamaha-yz125x-2005" class="product-grid-item"> 1465 <div class="product-grid-image"> 1466 <div class="product-grid-image--centered"> 1467 1468 <img src="//berad-products.myshopify.com/cdn/shop/files/DRT-DM842-R1A_large.jpg?v=1778905733" alt="DRT Cylinder Head Dome Insert ONLY - YAMAHA YZ125(X) 2005+"> 1469 </div> 1470 </div> 1471 1472 <p>DRT Cylinder Head Dome Insert ONLY - YAMAHA YZ125(X) 2005+</p> 1473 1474 <div class="product-item--price"> 1475 <span class="h1 medium--left"> 1476 1477 1478 1479 1480 1481 1482 1483 1484<small> 110<sup>00</sup></small> 1485 </span> 1486 1487 1488 </div> 1489 1490 1491 </a> 1492 1493</div> 1494 1495 1496 1497
1498<script> 1499 var currentScript = document.currentScript || document.scripts[document.scripts.length - 1]; 1500 var boldVariantIds =[42045828300903]; 1501 var boldProductHandle ="drt-cylinder-head-dome-insert-yamaha-yz250x-1999"; 1502 var BOLD = BOLD || {}; 1503 BOLD.products = BOLD.products || {}; 1504 BOLD.variant_lookup = BOLD.variant_lookup || {}; 1505 if (window.BOLD && !BOLD.common) { 1506 BOLD.common = BOLD.common || {}; 1507 BOLD.common.Shopify = BOLD.common.Shopify || {}; 1508 window.BOLD.common.Shopify.products = window.BOLD.common.Shopify.products || {}; 1509 window.BOLD.common.Shopify.variants = window.BOLD.common.Shopify.variants || {}; 1510 window.BOLD.common.Shopify.handles = window.BOLD.common.Shopify.handles || {}; 1511 window.BOLD.common.Shopify.saveProduct = function (handle, product) { 1512 if (typeof handle === 'string' && typeof window.BOLD.common.Shopify.products[handle] === 'undefined') { 1513 if (typeof product === 'number') { 1514 window.BOLD.common.Shopify.handles[product] = handle; 1515 product = { id: product }; 1516 } 1517 window.BOLD.common.Shopify.products[handle] = product; 1518 } 1519 }; 1520 window.BOLD.common.Shopify.saveVariant = function (variant_id, variant) { 1521 if (typeof variant_id === 'number' && typeof window.BOLD.common.Shopify.variants[variant_id] === 'undefined') { 1522 window.BOLD.common.Shopify.variants[variant_id] = variant; 1523 } 1524 }; 1525 } 1526 1527 for (var boldIndex = 0; boldIndex < boldVariantIds.length; boldIndex = boldIndex + 1) { 1528 BOLD.variant_lookup[boldVariantIds[boldIndex]] = boldProductHandle; 1529 } 1530 1531 BOLD.products[boldProductHandle] ={ 1532 "id":7482658619495, 1533 "title":"DRT Cylinder Head Dome Insert ONLY YAMAHA YZ250(X) 1999+","handle":"drt-cylinder-head-dome-insert-yamaha-yz250x-1999", 1534 "description":"\u003cp\u003eDRT Cylinder Head Dome Insert Yamaha YZ250(X) 1999+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eDRT cylinder heads are the cutting edge of cylinder head design, offering optimized performance for every riding style. Proudly designed and manufactured in the United States!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eBenefits compared to stock:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Optimized performance: more power where you need it, when you need it\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Choose between 3 dome insert options. Order one, two, or all 3 to unlock full control over the feel of your engine. Each dome offers very different power delivery characteristics!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Increased detonation resistance: more efficient combustion gains performance while also increasing reliability\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Better cooling: targeted heat removal where itâs most needed, giving further reliability gains\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Cleaner, more consistent jetting\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Reduced fuel consumption\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eDomes A through C are safe to run on 91+ octane (AKI) pump fuel. While each dome varies in\u003cspan class=\"Apple-converted-space\"\u003e \u003c\/span\u003ecompression ratio, they each have chamber geometry optimized for specific power delivery profiles. Please refer to the descriptions below to decide what will best suit you and your riding!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome A (low compression):\u003c\/strong\u003e\u003c\/span\u003e Mellow but very luggable low end with a linear feeling transition into a free-revving top end. The most friendly to ride but not lacking in torque or response. Great for beginner riders but plenty of fun for experienced riders too! Offers great control of traction in slick conditions.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome B (mid compression):\u003c\/strong\u003e\u003c\/span\u003e Luggable low end with a quick ramp into strong top end pull. Slight torque increase with quicker revving and harder hitting power band compared to dome A. Classic â250 2 strokeâ feel! For the rider that likes some spice when they get on the pipe!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome C (high compression):\u003c\/strong\u003e\u003c\/span\u003e Hard hitting and luggable low end with a broad mid range. Offers the most low end torque and peak power. Snappy and \"connected with throttle\" feeling power . Yeah, this one pulls hard!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eFitment:\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eYAMAHA YZ250 1999+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003eYAMAHA YZ250X 2016+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Products strongly recommend hiring professional help for installation. \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Products are not responsible for any injury or damages resulting from use or installation of this product.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eReturn Policy: Returns of unused and undamaged items will be accepted within 30 days of the shipping date. 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1553pace\"\u003e \u003c\/span\u003ecompression ratio, they each have chamber geometry optimized for specific power delivery profiles. Please refer to the descriptions below to decide what will best suit you and your riding!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome A (low compression):\u003c\/strong\u003e\u003c\/span\u003e Mellow but very luggable low end with a linear feeling transition into a free-revving top end. The most friendly to ride but not lacking in torque or response. Great for beginner riders but plenty of fun for experienced riders too! Offers great control of traction in slick conditions.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome B (mid compression):\u003c\/strong\u003e\u003c\/span\u003e Luggable low end with a quick ramp into strong top end pull. Slight torque increase with quicker revving and harder hitting power band compared to dome A. Classic â250 2 strokeâ feel! For the rider that likes some spice when they get on the pipe!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome C (high compression):\u003c\/strong\u003e\u003c\/span\u003e Hard hitting and luggable low end with a broad mid range. Offers the most low end torque and peak power. Snappy and \"connected with throttle\" feeling power . Yeah, this one pulls hard!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eFitment:\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eYAMAHA YZ250 1999+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003eYAMAHA YZ250X 2016+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Products strongly recommend hiring professional help for installation. \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Products are not responsible for any injury or damages resulting from use or installation of this product.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eReturn Policy: Returns of unused and undamaged items will be accepted within 30 days of the shipping date. When items are returned and inspected, a refund will be submitted, less the cost of shipping and a 20% restocking fee.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Screenshot_2025-11-28_at_11.04.16_AM.png?v=1764345867\"\u003e\u003c\/p\u003e","published_at":"2025-12-24T06:13:54-05:00","created_at":"2025-12-24T06:13:53-05:00","vendor":"DRT","type":"Cylinder Head","tags":["DRT","yamaha"],"price":11000,"price_min":11000,"price_max":11000,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":42045828300903,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"DRT Cylinder Head Dome Insert ONLY YAMAHA YZ250(X) 1999+","public_title":null,"options":["Default Title"],"price":11000,"weight":122,"compare_at_price":null,"inventory_quantity":-6,"inventory_management":null,"inventory_policy":"deny","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-DOME-C.png?v=1766651606","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-DOME-B.png?v=1766651606","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-DOME-A.png?v=1766651606"],"featured_image":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-DOME-C.png?v=1766651606","options":["Title"],"media":[{"alt":null,"id":29908470759527,"position":1,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-DOME-C.png?v=1766651606"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-DOME-C.png?v=1766651606","width":1500},{"alt":null,"id":29908470726759,"position":2,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-DOME-B.png?v=1766651606"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-DOME-B.png?v=1766651606","width":1500},{"alt":null,"id":29908470693991,"position":3,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-DOME-A.png?v=1766651606"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD768-R1-DOME-A.png?v=1766651606","width":1500}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp\u003eDRT Cylinder Head Dome Insert Yamaha YZ250(X) 1999+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eDRT cylinder heads are the cutting edge of cylinder head design, offering optimized performance for every riding style. Proudly designed and manufactured in the United States!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eBenefits compared to stock:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Optimized performance: more power where you need it, when you need it\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Choose between 3 dome insert options. Order one, two, or all 3 to unlock full control over the feel of your engine. Each dome offers very different power delivery characteristics!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Increased detonation resistance: more efficient combustion gains performance while also increasing reliability\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Better cooling: targeted heat removal where itâs most needed, giving further reliability gains\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Cleaner, more consistent jetting\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Reduced fuel consumption\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eDomes A through C are safe to run on 91+ octane (AKI) pump fuel. While each dome varies in\u003cspan class=\"Apple-converted-s
1553pace\"\u003e \u003c\/span\u003ecompression ratio, they each have chamber geometry optimized for specific power delivery profiles. Please refer to the descriptions below to decide what will best suit you and your riding!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome A (low compression):\u003c\/strong\u003e\u003c\/span\u003e Mellow but very luggable low end with a linear feeling transition into a free-revving top end. The most friendly to ride but not lacking in torque or response. Great for beginner riders but plenty of fun for experienced riders too! Offers great control of traction in slick conditions.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome B (mid compression):\u003c\/strong\u003e\u003c\/span\u003e Luggable low end with a quick ramp into strong top end pull. Slight torque increase with quicker revving and harder hitting power band compared to dome A. Classic â250 2 strokeâ feel! For the rider that likes some spice when they get on the pipe!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome C (high compression):\u003c\/strong\u003e\u003c\/span\u003e Hard hitting and luggable low end with a broad mid range. Offers the most low end torque and peak power. Snappy and \"connected with throttle\" feeling power . Yeah, this one pulls hard!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eFitment:\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eYAMAHA YZ250 1999+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003eYAMAHA YZ250X 2016+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Products strongly recommend hiring professional help for installation. \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Products are not responsible for any injury or damages resulting from use or installation of this product.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eReturn Policy: Returns of unused and undamaged items will be accepted within 30 days of the shipping date. When items are returned and inspected, a refund will be submitted, less the cost of shipping and a 20% restocking fee.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Screenshot_2025-11-28_at_11.04.16_AM.png?v=1764345867\"\u003e\u003c\/p\u003e"}; 1554 var bold_rp =[{}]; 1555 if(boldTempProduct){ 1556 window.BOLD.common.Shopify.saveProduct(boldTempProduct.handle, boldTempProduct.id); 1557 for (var boldIndex = 0; boldTempProduct && boldIndex < boldTempProduct.variants.length; boldIndex = boldIndex + 1){ 1558 var rp_group_id = bold_rp[boldIndex].rp_group_id ? '' + bold_rp[boldIndex].rp_group_id : ''; 1559 window.BOLD.common.Shopify.saveVariant( 1560 boldTempProduct.variants[boldIndex].id, 1561 { 1562 product_id: boldTempProduct.id, 1563 product_handle: boldTempProduct.handle, 1564 price: boldTempProduct.variants[boldIndex].price, 1565 group_id: rp_group_id, 1566 csp_metafield: boldCSPMetafields[boldTempProduct.variants[boldIndex].id] 1567 } 1568 ); 1569 } 1570 } 1571 1572 currentScript.parentNode.removeChild(currentScript); 1573 </script>
1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588<div class="grid-item large--one-fifth medium--one-third small--one-half"> 1589 1590 <a href="/collections/beradsbest/products/drt-cylinder-head-dome-insert-yamaha-yz250x-1999" class="product-grid-item"> 1591 <div class="product-grid-image"> 1592 <div class="product-grid-image--centered"> 1593 1594 <img src="//berad-products.myshopify.com/cdn/shop/files/DRT-HD768-R1-DOME-C_large.png?v=1766651606" alt="DRT Cylinder Head Dome Insert ONLY YAMAHA YZ250(X) 1999+"> 1595 </div> 1596 </div> 1597 1598 <p>DRT Cylinder Head Dome Insert ONLY YAMAHA YZ250(X) 1999+</p> 1599 1600 <div class="product-item--price"> 1601 <span class="h1 medium--left"> 1602 1603 1604 1605 1606 1607 1608 1609 1610<small> 110<sup>00</sup></small> 1611 </span> 1612 1613 1614 </div> 1615 1616 1617 </a> 1618 1619</div> 1620 1621 1622 1623
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1660ncy at low RPMs. Go ahead... run third gear everywhere. You can do it with a Rad Valve Torque Variation setup.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eAERO OPTIMIZED INTERNAL SURFACING\u003c\/h3\u003e\n\u003cp\u003eThe Rad Valve is the ONLY air intake system available with aerodynamic internal surfacing. Internal precision surfacing treatment eliminates all hard edges that interrupt with the proper delivery of air and fuel. Attention to the specific air and fuel requirements of each machine's unique engine pressures gives the RC2 Series Rad Valve the ability to reach consistent peak horsepower gains, optimizing the power profile to produce instant, explosive movements of air. The Result: Unparalleled performance.\u003c\/p\u003e\n\u003ch3\u003eX-CROSS DUAL CARBON WEAVE\u003c\/h3\u003e\n\u003cp\u003eThe Rad Valve's Multi-Staged reed petal stacks feature the absolute highest quality aerospace grade carbon material interwoven into specific tension combinations that maximize power delivery and peak horsepower. Boyesen engineers specifically tune the carbon matrix tension using a proprietary weave formula and special layup techniques that optimize each Rad Valve Reed to work in unision with the engine unique intake pressure pulses for each make\/model\/year machine.\u003c\/p\u003e\n\u003ch3\u003eMS PLUS FLOW OPTIMIZATION\u003c\/h3\u003e\n\u003cp\u003eBoyesen's race-proven MS PLUS Optimization uses multi-staged reed petals to distribute the engine?s pulse forces over more surface area. By using a multiple reed petal stack, it is possible to acheive peak horsepower and durability. The patented multi-stage design incorporates a specially shaped top reed petal and a ported bottom reed petal. The top petal is lightweight and resilient for crisp throttle response at partial throttle or low RPM. The stiffer, bottom petal is ported to provide maximum flow and horsepower at higher RPM.\u003c\/p\u003e", 1661 "published_at":"2026-02-12T15:37:17", 1662 "created_at":"2026-02-12T15:37:16", 1663 "vendor":"Boyesen", 1664 "type":"Intake", 1665 "tags":[], 1666 "price":20995, 1667 "price_min":20995, 1668 "price_max":20995, 1669 "price_varies":false, 1670 "compare_at_price":null, 1671 "compare_at_price_min":0, 1672 "compare_at_price_max":0, 1673 "compare_at_price_varies":false, 1674 "all_variant_ids":[42182209142887], 1675 "variants":[{"id":42182209142887,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"RAD34T","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Boyesen RAD Valve HIGH TORQUE - Performance Intake (Low\/Mid Range Power)","public_title":null,"options":["Default Title"],"price":20995,"weight":454,"compare_at_price":null,"inventory_quantity":-34,"inventory_management":null,"inventory_policy":"deny","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}], 1676 "available":null,"images":["\/\/berad-products.myshopify.com\/cdn\/shop\/files\/RAD34T-1.jpg?v=1770928629","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/RAD34T-2.jpg?v=1770928629","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/RAD34T-3.jpg?v=1770928629","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/RAD34T-4.jpg?v=1770928629","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/RAD34T-5.jpg?v=1770928629","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/RAD34T-6.jpg?v=1770928629","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/RAD34T-7.jpg?v=1770928629"],"featured_image":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/RAD34T-1.jpg?v=1770928629", 1677 "options":["Title"], 1678 "url":"\/products\/boyesen-rad-valve-high-torque-performance-intake-low-mid-range-power"};var boldCSPMetafields = {}; 1679 var boldTempProduct ={"id":7533100007527,"title":"Boyesen RAD Valve HIGH TORQUE - Performance Intake (Low\/Mid Range Power)","handle":"boyesen-rad-valve-high-torque-performance-intake-low-mid-range-power","description":"\u003cp\u003e\u003cspan\u003eBoyesen RAD Valve - Torque Variation - (Low End Power)\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003ePart Number: RAD34T\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFitment: Yamaha YZ250 2005-2026, Yamaha YZ250X 2016-2026, Fantic XX250 2022-2026\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eINSTALL TUTORIAL VIDEO: \u003c\/strong\u003e\u003ca href=\"https:\/\/youtu.be\/TpzY7CO
16791e04\" target=\"_blank\" title=\"Boyesen RAD Valve Install Tutorial\" rel=\"noopener\"\u003ehttps:\/\/youtu.be\/TpzY7CO1e04Â \u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cstrong\u003ePhotos are representational:Â Accuracy is ensured by Part Numbers.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eENHANCE YOUR YAMAHA POWER DELIVERY.\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eBoyesen's Rad Valve Air Intake Systems are a game-changer, allowing Yamaha 250 riders and Fantic 250 riders to fine-tune their power output in three distinct ways. With a choice of two distinct editions - the Rad Valve Torque and Rad Valve Broad Spectrum Power - riders can fine-tune their power characteristics to match their specific needs and preferences. You can choose from two power delivery options - aggressive low end response or a broad power delivery - for a customized riding experience.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eWHY CHOOSE THE RAD VALVE TORQUE VARIATION?\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eElevate your Yamaha YZ250\/250X or Fantic XX 250 to new heights with the Boyesen Rad Valve TORQUE Variation. Unleash the low-end power your bike deserves and experience a ride like never before. Order yours now and feel the thrill of frequency matched air intake performance! If you crave punchy and responsive low-end power and want to gain a setup advatage for Hard Enduro, or tight and technical terrain the Rad Valve TORQUE is your ultimate choice. Our product has undergone rigorous testing and optimization to ensure seamless integration with your Yamaha or Fantic machine. The Boyesen Rad Valve TORQUE is meticulously designed to optimize airflow at low RPMs, accentuating low-end power delivery. 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16791e04\" target=\"_blank\" title=\"Boyesen RAD Valve Install Tutorial\" rel=\"noopener\"\u003ehttps:\/\/youtu.be\/TpzY7CO1e04Â \u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cstrong\u003ePhotos are representational:Â Accuracy is ensured by Part Numbers.\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eENHANCE YOUR YAMAHA POWER DELIVERY.\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eBoyesen's Rad Valve Air Intake Systems are a game-changer, allowing Yamaha 250 riders and Fantic 250 riders to fine-tune their power output in three distinct ways. With a choice of two distinct editions - the Rad Valve Torque and Rad Valve Broad Spectrum Power - riders can fine-tune their power characteristics to match their specific needs and preferences. You can choose from two power delivery options - aggressive low end response or a broad power delivery - for a customized riding experience.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eWHY CHOOSE THE RAD VALVE TORQUE VARIATION?\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eElevate your Yamaha YZ250\/250X or Fantic XX 250 to new heights with the Boyesen Rad Valve TORQUE Variation. Unleash the low-end power your bike deserves and experience a ride like never before. Order yours now and feel the thrill of frequency matched air intake performance! If you crave punchy and responsive low-end power and want to gain a setup advatage for Hard Enduro, or tight and technical terrain the Rad Valve TORQUE is your ultimate choice. Our product has undergone rigorous testing and optimization to ensure seamless integration with your Yamaha or Fantic machine. The Boyesen Rad Valve TORQUE is meticulously designed to optimize airflow at low RPMs, accentuating low-end power delivery. The reeds are engineered for rapid power transfer and maximum flow efficiency at low RPMs. Go ahead... run third gear everywhere. You can do it with a Rad Valve Torque Variation setup.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003eAERO OPTIMIZED INTERNAL SURFACING\u003c\/h3\u003e\n\u003cp\u003eThe Rad Valve is the ONLY air intake system available with aerodynamic internal surfacing. Internal precision surfacing treatment eliminates all hard edges that interrupt with the proper delivery of air and fuel. Attention to the specific air and fuel requirements of each machine's unique engine pressures gives the RC2 Series Rad Valve the ability to reach consistent peak horsepower gains, optimizing the power profile to produce instant, explosive movements of air. The Result: Unparalleled performance.\u003c\/p\u003e\n\u003ch3\u003eX-CROSS DUAL CARBON WEAVE\u003c\/h3\u003e\n\u003cp\u003eThe Rad Valve's Multi-Staged reed petal stacks feature the absolute highest quality aerospace grade carbon material interwoven into specific tension combinations that maximize power delivery and peak horsepower. Boyesen engineers specifically tune the carbon matrix tension using a proprietary weave formula and special layup techniques that optimize each Rad Valve Reed to work in unision with the engine unique intake pressure pulses for each make\/model\/year machine.\u003c\/p\u003e\n\u003ch3\u003eMS PLUS FLOW OPTIMIZATION\u003c\/h3\u003e\n\u003cp\u003eBoyesen's race-proven MS PLUS Optimization uses multi-staged reed petals to distribute the engine?s pulse forces over more surface area. By using a multiple reed petal stack, it is possible to acheive peak horsepower and durability. The patented multi-stage design incorporates a specially shaped top reed petal and a ported bottom reed petal. The top petal is lightweight and resilient for crisp throttle response at partial throttle or low RPM. The stiffer, bottom petal is ported to provide maximum flow and horsepower at higher RPM.\u003c\/p\u003e"}; 1680 var bold_rp =[{}]; 1681 if(boldTempProduct){ 1682 window.BOLD.common.Shopify.saveProduct(boldTempProduct.handle, boldTempProduct.id); 1683 for (var boldIndex = 0; boldTempProduct && boldIndex < boldTempProduct.variants.length; boldIndex = boldIndex + 1){ 1684 var rp_group_id = bold_rp[boldIndex].rp_group_id ? '' + bold_rp[boldIndex].rp_group_id : ''; 1685 window.BOLD.common.Shopify.saveVariant( 1686 boldTempProduct.variants[boldIndex].id, 1687 { 1688 product_id: boldTempProduct.id, 1689 product_handle: boldTempProduct.handle, 1690 price: boldTempProduct.variants[boldIndex].price, 1691 group_id: rp_group_id, 1692 csp_metafield: boldCSPMetafields[boldTempProduct.variants[boldIndex].id] 1693 } 1694 ); 1695 } 1696 } 1697 1698 currentScript.parentNode.removeChild(currentScript); 1699 </script>
1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714<div class="grid-item large--one-fifth medium--one-third small--one-half"> 1715 1716 <a href="/collections/beradsbest/products/boyesen-rad-valve-high-torque-performance-intake-low-mid-range-power" class="product-grid-item"> 1717 <div class="product-grid-image"> 1718 <div class="product-grid-image--centered"> 1719 1720 <img src="//berad-products.myshopify.com/cdn/shop/files/RAD34T-1_large.jpg?v=1770928629" alt="Boyesen RAD Valve HIGH TORQUE - Performance Intake (Low/Mid Range Power)"> 1721 </div> 1722 </div> 1723 1724 <p>Boyesen RAD Valve HIGH TORQUE - Performance Intake (Low/Mid Range Power)</p> 1725 1726 <div class="product-item--price"> 1727 <span class="h1 medium--left"> 1728 1729 1730 1731 1732 1733 1734 1735 1736<small> 209<sup>95</sup></small> 1737 </span> 1738 1739 1740 </div> 1741 1742 1743 </a> 1744 1745</div> 1746 1747 1748 1749
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1786on-existent, the proper air\/fuel control is optimized for each make\/model\/year machine. This attention to the specific air and fuel requirements of each machine's engine gives the RC2 Series Rad Valve the ability to reach consistent peak horsepower gains, optimizing power delivery for each specific application.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable cellpadding=\"0\" cellspacing=\"0\" border=\"0\" width=\"554\" height=\"158\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 547px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eXCROSS DUAL CARBON WEAVE\u003cbr\u003eModel-Specific variable tension reed petals.\u003c\/strong\u003e\u003cbr\u003eThe Rad Valve's Multi-Staged reed petal stacks feature Aerospace carbon material interwoven into tension combinations that maximize power delivery and peak horsepower. 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The Result: A true, bolt-on Power Boost.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable cellpadding=\"0\" cellspacing=\"0\" border=\"0\" width=\"550\" height=\"337\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 547px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eAERO OPTIMIZED INTERNAL SURFACING\u003cbr\u003eThe Rad Valve is the ONLY air intake system available with aerodynamic internal surfacing.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIntegrated into the Rad Valve's seamless interior chamber are 4-way aerodynamic directional dividers that distribute the angled charge evenly without flow loss. Each channel has its own unique Power Profile, scientifically shaped to produce instant, explosive movements of air. The Result: Unparalleled performance.\u003c\/p\u003e\n\u003cp\u003eInternal precision surfacing treatment eliminates all hard edges that interrupt with the proper delivery of air and fuel. Because internal air turbulence is virtually n
1805on-existent, the proper air\/fuel control is optimized for each make\/model\/year machine. This attention to the specific air and fuel requirements of each machine's engine gives the RC2 Series Rad Valve the ability to reach consistent peak horsepower gains, optimizing power delivery for each specific application.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable cellpadding=\"0\" cellspacing=\"0\" border=\"0\" width=\"554\" height=\"158\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 547px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eXCROSS DUAL CARBON WEAVE\u003cbr\u003eModel-Specific variable tension reed petals.\u003c\/strong\u003e\u003cbr\u003eThe Rad Valve's Multi-Staged reed petal stacks feature Aerospace carbon material interwoven into tension combinations that maximize power delivery and peak horsepower. Boyesen engineers specifically tune the carbon matrix tension using a proprietary weave formula that is tested and optimized for each make\/model\/year machine.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","published_at":"2020-02-06T20:05:43-05:00","created_at":"2020-02-06T20:25:36-05:00","vendor":"Boyesen","type":"Motorcycle Misc.","tags":["boyesen","cr","cr125","cr125r","cr250","cr250r","rad","valve","yz","yz125","yz125x","yz250","yz250x"],"price":17995,"price_min":17995,"price_max":17995,"available":true,"price_varies":false,"compare_at_price":18000,"compare_at_price_min":18000,"compare_at_price_max":18000,"compare_at_price_varies":false,"variants":[{"id":31913717956711,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Boyesen RAD Valve SPRINT - Performance Intake (Top End Power)","public_title":null,"options":["Default Title"],"price":17995,"weight":454,"compare_at_price":18000,"inventory_quantity":-34,"inventory_management":null,"inventory_policy":"continue","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/berad-products.myshopify.com\/cdn\/shop\/products\/RAD_Valve_YZ250_1.png?v=1581060807","\/\/berad-products.myshopify.com\/cdn\/shop\/products\/RAD_Valve_YZ250_2.png?v=1581060807","\/\/berad-products.myshopify.com\/cdn\/shop\/products\/RAD_Valve_YZ125_2.png?v=1581060807","\/\/berad-products.myshopify.com\/cdn\/shop\/products\/RAD_Valve_YZ125_1.png?v=1581060807"],"featured_image":"\/\/berad-products.myshopify.com\/cdn\/shop\/products\/RAD_Valve_YZ250_1.png?v=1581060807","options":["Title"],"media":[{"alt":null,"id":6528547749991,"position":1,"preview_image":{"aspect_ratio":1.5,"height":1000,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/products\/RAD_Valve_YZ250_1.png?v=1581060807"},"aspect_ratio":1.5,"height":1000,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/products\/RAD_Valve_YZ250_1.png?v=1581060807","width":1500},{"alt":null,"id":6528547782759,"position":2,"preview_image":{"aspect_ratio":1.5,"height":1000,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/products\/RAD_Valve_YZ250_2.png?v=1581060807"},"aspect_ratio":1.5,"height":1000,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/products\/RAD_Valve_YZ250_2.png?v=1581060807","width":1500},{"alt":null,"id":6528547717223,"position":3,"preview_image":{"aspect_ratio":1.5,"height":1000,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/products\/RAD_Valve_YZ125_2.png?v=1581060807"},"aspect_ratio":1.5,"height":1000,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/products\/RAD_Valve_YZ125_2.png?v=1581060807","width":1500},{"alt":null,"id":6528547684455,"position":4,"preview_image":{"aspect_ratio":1.5,"height":1000,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/products\/RAD_Valve_YZ125_1.png?v=1581060807"},"aspect_ratio":1.5,"height":1000,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/products\/RAD_Valve_YZ125_1.png?v=1581060807","width":1500}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp\u003e\u003cspan\u003eBoyesen RAD Valve high performance intake\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFitment: Yamaha YZ125 2005+, Yamaha YZ125X 2020+, Yamaha YZ250 2005+, Yamaha YZ250X 2016+, Yamaha YZ250 2000-2004, Honda CR125R 2005-2007, Honda CR250R 2005-2007\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cstrong\u003eINSTALL TUTORIAL VIDEO: \u003c\/strong\u003e\u003ca href=\"https:\/\/youtu.be\/TpzY7CO
18051e04\" title=\"Boyesen RAD Valve Install Tutorial\" rel=\"noopener\" target=\"_blank\"\u003ehttps:\/\/youtu.be\/TpzY7CO1e04\u003c\/a\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eYour engine is a glutton for air. It will take over 200 \"gulps\" per second, at velocities over 500 MPH - if your intake valve will let it. The Rad Valve's seamless, one-piece, precision casting and continuous aeroform surfaces ensure maximum flow velocities and instant, explosive movement of air particles the moment you open the throttle.\u003c\/span\u003e\u003cbr\u003e\u003cbr\u003e\u003cspan\u003eWhile other aftermarket valves might change flange sizes or bolt patterns, they're basically generic - and require you to irreversibly cut your intake boot to install it! But with the RAD Valve, there are no compromises in power, no modifications. The Result: A true, bolt-on Power Boost.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable cellpadding=\"0\" cellspacing=\"0\" border=\"0\" width=\"550\" height=\"337\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 547px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eAERO OPTIMIZED INTERNAL SURFACING\u003cbr\u003eThe Rad Valve is the ONLY air intake system available with aerodynamic internal surfacing.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIntegrated into the Rad Valve's seamless interior chamber are 4-way aerodynamic directional dividers that distribute the angled charge evenly without flow loss. Each channel has its own unique Power Profile, scientifically shaped to produce instant, explosive movements of air. The Result: Unparalleled performance.\u003c\/p\u003e\n\u003cp\u003eInternal precision surfacing treatment eliminates all hard edges that interrupt with the proper delivery of air and fuel. Because internal air turbulence is virtually non-existent, the proper air\/fuel control is optimized for each make\/model\/year machine. This attention to the specific air and fuel requirements of each machine's engine gives the RC2 Series Rad Valve the ability to reach consistent peak horsepower gains, optimizing power delivery for each specific application.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ctable cellpadding=\"0\" cellspacing=\"0\" border=\"0\" width=\"554\" height=\"158\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 547px;\"\u003e\n\u003cp\u003e\u003cstrong\u003eXCROSS DUAL CARBON WEAVE\u003cbr\u003eModel-Specific variable tension reed petals.\u003c\/strong\u003e\u003cbr\u003eThe Rad Valve's Multi-Staged reed petal stacks feature Aerospace carbon material interwoven into tension combinations that maximize power delivery and peak horsepower. Boyesen engineers specifically tune the carbon matrix tension using a proprietary weave formula that is tested and optimized for each make\/model\/year machine.\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e"}; 1806 var bold_rp =[{}]; 1807 if(boldTempProduct){ 1808 window.BOLD.common.Shopify.saveProduct(boldTempProduct.handle, boldTempProduct.id); 1809 for (var boldIndex = 0; boldTempProduct && boldIndex < boldTempProduct.variants.length; boldIndex = boldIndex + 1){ 1810 var rp_group_id = bold_rp[boldIndex].rp_group_id ? '' + bold_rp[boldIndex].rp_group_id : ''; 1811 window.BOLD.common.Shopify.saveVariant( 1812 boldTempProduct.variants[boldIndex].id, 1813 { 1814 product_id: boldTempProduct.id, 1815 product_handle: boldTempProduct.handle, 1816 price: boldTempProduct.variants[boldIndex].price, 1817 group_id: rp_group_id, 1818 csp_metafield: boldCSPMetafields[boldTempProduct.variants[boldIndex].id] 1819 } 1820 ); 1821 } 1822 } 1823 1824 currentScript.parentNode.removeChild(currentScript); 1825 </script>
1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840<div class="grid-item large--one-fifth medium--one-third small--one-half on-sale"> 1841 1842 <a href="/collections/beradsbest/products/boyesen-rad-valve-sprint-performance-intake-top-end-power" class="product-grid-item"> 1843 <div class="product-grid-image"> 1844 <div class="product-grid-image--centered"> 1845 1846 <img src="//berad-products.myshopify.com/cdn/shop/products/RAD_Valve_YZ250_1_large.png?v=1581060807" alt="Boyesen RAD Valve SPRINT - Performance Intake (Top End Power)"> 1847 </div> 1848 </div> 1849 1850 <p>Boyesen RAD Valve SPRINT - Performance Intake (Top End Power)</p> 1851 1852 <div class="product-item--price"> 1853 <span class="h1 medium--left"> 1854 1855 1856 1857 1858 1859 1860 1861 1862<small> 179<sup>95</sup></small> 1863 </span> 1864 1865 1866 <span class="sale-tag medium--right"> 1867 1868 1869 1870 1871 1872 1873 1874 1875Save $ 0.05 1876 1877 1878 1879 </span> 1880 1881 </div> 1882 1883 1884 </a> 1885 1886</div> 1887 1888 1889 1890 1891 </div> 1892 1893 1894 1895 1896 1897
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vendor: 1 bytes, line 1898
1898
1899<script> 1900 1901 // Pre-loading product images, to avoid a lag when a thumbnail is clicked, or 1902 // when a variant is selected that has a variant image. 1903 Shopify.Image.preload(["\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-BLUE-DOME.jpg?v=1778905733","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-RAW-DOME.jpg?v=1778905733","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1A.jpg?v=1778905733","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1B.jpg?v=1778905733","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1C.jpg?v=1778905733","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-INSIDE-BLUE.jpg?v=1779303420","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-INSIDE-DOME.jpg?v=1779303420","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-LOGO-BLUE.jpg?v=1779303420","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-LOGO-RAW.jpg?v=1779303420","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-CW842_5.jpg?v=1779303371","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-OR842.jpg?v=1779303419","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-YZ125-Box.jpg?v=1779303420","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRTLogoBlack.png?v=1766651679","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/Jetting-Chart-YZ125-2005-2022.jpg?v=1779311370","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/Jetting-Chart-YZ125-2023.jpg?v=1779311370","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/Squish_Chart.png?v=1779311371","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_STOCK_X.jpg?v=1784495124","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_A.jpg?v=1784495124","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_STOCK_MOTO.jpg?v=1784495124","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_B.jpg?v=1784495124","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_C.jpg?v=1784495124","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_D.jpg?v=1784495124","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_E.jpg?v=1784495124"], 'large'); 1904 1905 var selectCallback = function(variant, selector) { 1906 1907 var $addToCart = $('#addToCart'), 1908 $productPrice = $('#productPrice'), 1909 $comparePrice = $('#comparePrice'), 1910 $variantQuantity = $('#variantQuantity'), 1911 $quantityElements = $('.quantity-selector, label + .js-qty'), 1912 $addToCartText = $('#addToCartText'), 1913 $featuredImage = $('#productPhotoImg'); 1914 1915 if (variant) { 1916 // Update variant image, if one is set 1917 // Call timber.switchImage function in shop.js 1918 if (variant.featured_image) { 1919 var newImg = variant.featured_image, 1920 el = $featuredImage[0]; 1921 $(function() { 1922 Shopify.Image.switchImage(newImg, el, timber.switchImage); 1923 }); 1924 } 1925 1926 // Select a valid variant if available 1927 if (variant.available) { 1928 // We have a valid product variant, so enable the submit button 1929 $addToCart.removeClass('disabled').prop('disabled', false); 1930 $addToCartText.html("Add to Cart"); 1931 1932 // Show how many items are left, if below 10 1933 1934 if (variant.inventory_management) { 1935 if (variant.inventory_quantity < 10 && variant.inventory_quantity > 0) { 1936 $variantQuantity.html("Only 1 left!".replace('1', variant.inventory_quantity)).addClass('is-visible'); 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1967 } 1968 1969 } else { 1970 // The variant doesn't exist, disable submit button. 1971 // This may be an error or notice that a specific variant is not available. 1972 $addToCart.addClass('disabled').prop('disabled', true); 1973 $addToCartText.html("Unavailable"); 1974 $variantQuantity.removeClass('is-visible'); 1975 $quantityElements.hide(); 1976 } 1977 }; 1978 1979 jQuery(function($) { 1980 new Shopify.OptionSelectors('productSelect', { 1981 product: {"id":7621422415975,"title":"DRT Cylinder Head Kit YAMAHA YZ125(X) 2005+","handle":"drt-cylinder-head-kit-yamaha-yz125x-2005","description":"\u003cp class=\"p1\"\u003eDRT Cylinder Head Kit YAMAHA YZ125(X) 2005+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003eDRT cylinder heads are the cutting edge of cylinder head design, offering optimized performance for every riding style. Proudly designed and manufactured in the United States!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eFitment:\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eYAMAHA YZ125 2005+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003eYAMAHA YZ125X 2020+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003ca rel=\"noopener\" title=\"DRT Cylinder Head Install Tutorial\" href=\"https:\/\/www.youtube.com\/watch?v=mUKkQuCiHk4\" target=\"_blank\"\u003eCLICK HERE FOR INSTALL VIDEO!\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eBase Cylinder Head Kit Includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eHead\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eDome\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eO-Ring Kit (3 pieces)\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eCopper Washer Kit\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eInstallation Instru
1981ctions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eBenefits compared to stock:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Optimized performance: more power where you need it, when you need it\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Choose between 3 dome insert options. Order one, two, or all 3 to unlock full control over the feel of your engine. Each dome offers very different power delivery characteristics!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Increased detonation resistance: more efficient combustion gains performance while also increasing reliability\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Better cooling: targeted heat removal where itâs most needed, giving further reliability gains\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Cleaner, more consistent jetting\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Reduced fuel consumption\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eDomes A and B are safe to run on 91+ octane (AKI) pump fuel. Dome C may require 93+ octane for riders staying in higher rpm for longer periods of time. While each dome varies in\u003cspan class=\"Apple-converted-space\"\u003e \u003c\/span\u003ecompression ratio, they each have chamber geometry optimized for specific power delivery profiles. Please refer to the descriptions below to decide what will best suit you and your riding! Domes D and E provide the most peak power and require high octane fuel to prevent detonation. See specifications and power descriptions below.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome A (low compression\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e Low end improvement compared to stock with a linear feeling mid range into a free-revving top end. The most friendly to ride but not lacking in torque or response. Great for beginner riders but plenty of fun for experienced riders too! Offers great control of traction in slick conditions.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome B (mid compression\u003cmeta charset=\"utf-8\"\u003e\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e \u003cmeta charset=\"utf-8\"\u003eLow end improvement compared to stock with a quick ramp into strong top end pull. Slight bottom end torque increase from Dome A with a quicker revving and harder hitting power band compared to dome A. For the rider that keeps it at wide open.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome C (high compression\u003cmeta charset=\"utf-8\"\u003e\/91+ octane***):\u003c\/strong\u003e\u003c\/span\u003e Luggable low end with a broad mid range. Offers the most low end torque and peak power. Snappy and \"connected with throttle\" feel. Yeah, this one pulls hard! ***Higher octane fuel may required for faster riders*** \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome D (high compression\/100+ octane):\u003c\/strong\u003e\u003c\/span\u003e COMING SOON! Similar power curve to Dome C but MORE power across the rev range! 100+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome E (high compression\/110+ octane):\u003c\/strong\u003e\u003c\/span\u003e COMING SOON! \u003cmeta charset=\"utf-8\"\u003eSimilar power curve to Dome C\/D but EVEN MORE power across the rev range! 110+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Moto strongly recommend hiring professional help for installation. \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Moto are not responsible for any injury or damages resulting from use or installation of this product.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eReturn Policy: Returns of unused and undamaged items will be accepted within 30 days of the shipping date. When items are returned and inspected, a refund will be submitted, less the cost of shipping and a 20% restocking fee.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Jetting-Chart-YZ125-2005-2022_c6d2f1fa-9bd9-4758-9333-5542bce60067.jpg?v=1782243300\" alt=\"\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Jetting-Chart-YZ125-2023_0976daa1-6257-4326-9774-2f568f3ef32b.jpg?v=1782243257\"\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Screenshot_2026-05-10_at_7.40.58_PM.png?v=1778456472\"\u003e\u003c\/p\u003e","published_at":"2026-05-10T18:20:41-04:00","created_at":"2026-05-10T15:58:22-04:00","vendor":"DRT","type":"Cylinder Head","tags":["yamaha"],"price":28000,"price_min":28000,"price_max":28000,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":44565392162919,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":null,"requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"DRT Cylinder Head Kit YAMAHA YZ125(X) 2005+","public_title":null,"options":["Default Title"],"price":28000,"weight":499,"compare_at_price":null,"inventory_quantity":-27,"inventory_management":null,"inventory_policy":"deny","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-BLUE-DOME.jpg?v=1778905733","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-RAW-DOME.jpg?v=1778905733","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1A.jpg?v=1778905733","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1B.jpg?v=1778905733","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1C.jpg?v=1778905733","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-INSIDE-BLUE.jpg?v=1779303420","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-INSIDE-DOME.jpg?v=1779303420","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-LOGO-BLUE.jpg?v=1779303420","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-LOGO-RAW.jpg?v=1779303420","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-CW842_5.jpg?v=1779303371","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-OR842.jpg?v=1779303419","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-YZ125-Box.jpg?v=1779303420","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRTLogoBlack.png?v=1766651679","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/Jetting-Chart-YZ125-2005-2022.jpg?v=1779311370","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/Jetting-Chart-YZ125-2023.jpg?v=1779311370","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/Squish_Chart.png?v=1779311371","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_STOCK_X.jpg?v=1784495124","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_A.jpg?v=1784495124","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_STOCK_MOTO.jpg?v=1784495124","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_B.jpg?v=1784495124","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_C.jpg?v=1784495124","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_D.jpg?v=1784495124","\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_E.jpg?v=1784495124"],"featured_image":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-BLUE-DOME.jpg?v=1778905733","options":["Title"],"media":[{"alt":null,"id":30667735105639,"position":1,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-BLUE-DOME.jpg?v=1778905733"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-BLUE-DOME.jpg?v=1778905733","width":1500},{"alt":null,"id":30667735236711,"position":2,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-RAW-DOME.jpg?v=1778905733"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-RAW-DOME.jpg?v=1778905733","width":1500},{"alt":null,"id":30667735203943,"position":3,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1A.jpg?v=1778905733"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1A.jpg?v=1778905733","width":1500},{"alt":null,"id":30667735171175,"position":4,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1B.jpg?v=1778905733"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1B.jpg?v=1778905733","width":1500},{"alt":null,"id":30667735138407,"position":5,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1C.jpg?v=1778905733"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-DM842-R1C.jpg?v=1778905733","width":1500},{"alt":null,"id":30689764180071,"position":6,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-INSIDE-BLUE.jpg?v=1779303420"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-INSIDE-BLUE.jpg?v=1779303420","width":1500},{"alt":null,"id":30689764114535,"position":7,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT-HD842-R1-INSIDE-DOME.jpg?v=1779303420"},"aspect_ratio":1.0,"height":1500,"media_type":"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1981tat_Card_YZ125_X_C.jpg?v=1784495124","width":1500},{"alt":null,"id":31030665216103,"position":22,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_D.jpg?v=1784495124"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_D.jpg?v=1784495124","width":1500},{"alt":null,"id":31030665347175,"position":23,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_E.jpg?v=1784495124"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_E.jpg?v=1784495124","width":1500}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp class=\"p1\"\u003eDRT Cylinder Head Kit YAMAHA YZ125(X) 2005+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003eDRT cylinder heads are the cutting edge of cylinder head design, offering optimized performance for every riding style. Proudly designed and manufactured in the United States!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eFitment:\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eYAMAHA YZ125 2005+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003eYAMAHA YZ125X 2020+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003ca rel=\"noopener\" title=\"DRT Cylinder Head Install Tutorial\" href=\"https:\/\/www.youtube.com\/watch?v=mUKkQuCiHk4\" target=\"_blank\"\u003eCLICK HERE FOR INSTALL VIDEO!\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eBase Cylinder Head Kit Includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli class=\"p1\"\u003eHead\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eDome\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eO-Ring Kit (3 pieces)\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eCopper Washer Kit\u003c\/li\u003e\n\u003cli class=\"p1\"\u003eInstallation Instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eBenefits compared to stock:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Optimized performance: more power where you need it, when you need it\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Choose between 3 dome insert options. Order one, two, or all 3 to unlock full control over the feel of your engine. Each dome offers very different power delivery characteristics!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Increased detonation resistance: more efficient combustion gains performance while also increasing reliability\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Better cooling: targeted heat removal where itâs most needed, giving further reliability gains\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Cleaner, more consistent jetting\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Reduced fuel consumption\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003eDomes A and B are safe to run on 91+ octane (AKI) pump fuel. Dome C may require 93+ octane for riders staying in higher rpm for longer periods of time. While each dome varies in\u003cspan class=\"Apple-converted-space\"\u003e \u003c\/span\u003ecompression ratio, they each have chamber geometry optimized for specific power delivery profiles. Please refer to the descriptions below to decide what will best suit you and your riding! Domes D and E provide the most peak power and require high octane fuel to prevent detonation. See specifications and power descriptions below.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome A (low compression\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e Low end improvement compared to stock with a linear feeling mid range into a free-revving top end. The most friendly to ride but not lacking in torque or response. Great for beginner riders but plenty of fun for experienced riders too! Offers great control of traction in slick conditions.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome B (mid compression\u003cmeta charset=\"utf-8\"\u003e\/91+ octane):\u003c\/strong\u003e\u003c\/span\u003e \u003cmeta charset=\"utf-8\"\u003eLow end improvement compared to stock with a quick ramp into strong top end pull. Slight bottom end torque increase from Dome A with a quicker revving and harder hitting power band compared to dome A. For the rider that keeps it at wide open.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome C (high compression\u003cmeta charset=\"utf-8\"\u003e\/91+ octane***):\u003c\/strong\u003e\u003c\/span\u003e Luggable low end with a broad mid range. Offers the most low end torque and peak power. Snappy and \"connected with throttle\" feel. Yeah, this one pulls hard! ***Higher octane fuel may required for faster riders*** \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome D (high compression\/100+ octane):\u003c\/strong\u003e\u003c\/span\u003e COMING SOON! Similar power curve to Dome C but MORE power across the rev range! 100+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eDome E (high compression\/110+ octane):\u003c\/strong\u003e\u003c\/span\u003e COMING SOON! \u003cmeta charset=\"utf-8\"\u003eSimilar power curve to Dome C\/D but EVEN MORE power across the rev range! 110+ octane required to prevent detonation.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e \u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Moto strongly recommend hiring professional help for installation. \u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cem\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003e\u003cspan style=\"color: rgb(249, 1, 1); text-decoration: underline;\"\u003eDRT and BeRAD Moto are not responsible for any injury or damages resulting from use or installation of this product.\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eReturn Policy: Returns of unused and undamaged items will be accepted within 30 days of the shipping date. When items are returned and inspected, a refund will be submitted, less the cost of shipping and a 20% restocking fee.\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Jetting-Chart-YZ125-2005-2022_c6d2f1fa-9bd9-4758-9333-5542bce60067.jpg?v=1782243300\" alt=\"\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Jetting-Chart-YZ125-2023_0976daa1-6257-4326-9774-2f568f3ef32b.jpg?v=1782243257\"\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cimg\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/Screenshot_2026-05-10_at_7.40.58_PM.png?v=1778456472\"\u003e\u003c\/p\u003e"}, 1982 onVariantSelected: selectCallback, 1983 enableHistoryState: true 1984 }); 1985 1986 // Add label if only one product option and it isn't 'Title'. Could be 'Size'. 1987 1988 1989 // Hide selectors if we only have 1 variant and its title contains 'Default'. 1990 1991 $('.selector-wrapper').hide(); 1992 1993 }); 1994</script>
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