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17  DRT Cylinder Head Kit YAMAHA YZ125(X) 2005+ &ndash; BeRAD Moto
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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">
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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 it’s most needed, giving further reliability gains -Cleaner, more consistent jetting -Reduced fuel consumption">
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160<script data-source-attribution="shopify.dynamic_checkout.buyer_consent">
161  function portableWalletsHideBuyerConsent(e){var t=document.getElementById("shopify-buyer-consent"),n=document.getElementById("shopify-subscription-policy-button");t&&n&&(t.classList.add("hidden"),t.setAttribute("aria-hidden","true"),n.removeEventListener("click",e))}function portableWalletsShowBuyerConsent(e){var t=document.getElementById("shopify-buyer-consent"),n=document.getElementById("shopify-subscription-policy-button");t&&n&&(t.classList.remove("hidden"),t.removeAttribute("aria-hidden"),n.addEventListener("click",e))}window.Shopify?.PaymentButton&&(window.Shopify.PaymentButton.hideBuyerConsent=portableWalletsHideBuyerConsent,window.Shopify.PaymentButton.showBuyerConsent=portableWalletsShowBuyerConsent);
162</script>
vendor: 1 bytes, line 162
162
163<script data-source-attribution="shopify.dynamic_checkout.cart.bootstrap">document.addEventListener("DOMContentLoaded",(function(){function t(){return document.querySelector("shopify-accelerated-checkout-cart, shopify-accelerated-checkout")}if(t())Shopify.PaymentButton.init();else{new MutationObserver((function(e,n){t()&&(Shopify.PaymentButton.init(),n.disconnect())})).observe(document.body,{childList:!0,subtree:!0})}}));
164</script>
164
165<link id="shopify-accelerated-checkout-styles" rel="stylesheet" media="screen" href="https://berad-products.myshopify.com/cdn/shopifycloud/portable-wallets/latest/accelerated-checkout-backwards-compat.css" crossorigin="anonymous">
166<style id="shopify-accelerated-checkout-cart">
167        #shopify-buyer-consent {
168  margin-top: 1em;
169  display: inline-block;
170  width: 100%;
171}
172
173#shopify-buyer-consent.hidden {
174  display: none;
175}
176
177#shopify-subscription-policy-button {
178  background: none;
179  border: none;
180  padding: 0;
181  text-decoration: underline;
182  font-size: inherit;
183  cursor: pointer;
184}
185
186#shopify-subscription-policy-button::before {
187  box-shadow: none;
188}
189
190      </style>
191
192<script id="shopify-cfh-end">window.performance && window.performance.mark && window.performance.mark('shopify.content_for_header.end');</script>
192
193
194<script>
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196    window.BOLD.options = {settings: {v1_variant_mode : true, hybrid_fix_auto_insert_inputs: true}};
197</script>
197<script>window.BOLD = window.BOLD || {};
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199    window.BOLD.common.Shopify = window.BOLD.common.Shopify || {};
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202      permanent_domain: 'berad-products.myshopify.com',
203      url: 'https://berad-products.myshopify.com',
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272    window.BOLD.common.Shopify.variants = window.BOLD.common.Shopify.variants || {};
273    window.BOLD.common.Shopify.handles = window.BOLD.common.Shopify.handles || {};window.BOLD.common.Shopify.handle = "drt-cylinder-head-kit-yamaha-yz125x-2005"
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317    "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 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 it’s 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
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. 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",
318    "published_at":"2026-05-10T18:20:41",
319    "created_at":"2026-05-10T15:58:22",
320    "vendor":"DRT",
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336          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
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 it’s 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 it’s 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"};
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1004            
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1009
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1011
1012<small> 280<sup>00</sup></small>
1013          </span>
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1028              <option  selected="selected"  data-sku="" value="44565392162919">Default Title - $ 280.00 USD</option>
1029
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1046
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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"> </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 it’s 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"> </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">  </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"> </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*** </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"> </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>
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1202    "title":"DRT Cylinder Head Kit YAMAHA YZ125(X) 2005+","handle":"drt-cylinder-head-kit-yamaha-yz125x-2005",
1203    "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 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 it’s 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
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",
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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 it’s 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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,"id":31030665281639,"position":21,"preview_image":{"aspect_ratio":1.0,"height":1500,"width":1500,"src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_Stat_Card_YZ125_X_C.jpg?v=1784495124"},"aspect_ratio":1.0,"height":1500,"media_type":"image","src":"\/\/berad-products.myshopify.com\/cdn\/shop\/files\/DRT_S
1222tat_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 it’s 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. 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1282    "description":"\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 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 it’s 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
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 “250 2 stroke” 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",
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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 it’s 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 “250 2 stroke” 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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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 it’s 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 “250 2 stroke” 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"};
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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">
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1358<small> 280<sup>00</sup></small>
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1362    </div>
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1407    "title":"DRT Cylinder Head Dome Insert ONLY - YAMAHA YZ125(X) 2005+","handle":"drt-cylinder-head-dome-insert-only-yamaha-yz125x-2005",
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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 it’s 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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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 it’s 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"};
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1471
1472    <p>DRT Cylinder Head Dome Insert ONLY - YAMAHA YZ125(X) 2005+</p>
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1476        
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1484<small> 110<sup>00</sup></small>
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1487      
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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 it’s 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 “250 2 stroke” 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",
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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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1598    <p>DRT Cylinder Head Dome Insert ONLY YAMAHA YZ250(X) 1999+</p>
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1610<small> 110<sup>00</sup></small>
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16791e04\" target=\"_blank\" title=\"Boyesen RAD Valve Install Tutorial\" rel=\"noopener\"\u003ehttps:\/\/youtu.be\/TpzY7CO1e04 \u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cmeta charset=\"utf-8\"\u003e \u003cstrong\u003ePhotos are representational: 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"};
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1862<small> 179<sup>95</sup></small>
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1952        $variantQuantity.removeClass('is-visible');
1953        $quantityElements.hide();
1954      }
1955
1956      // Regardless of stock, update the product price
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1958      $productPrice.html(customPriceFormat);
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1960      // Also update and show the product's compare price if necessary
1961      if ( variant.compare_at_price > variant.price ) {
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1978
1979  jQuery(function($) {
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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 it’s 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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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 it’s 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"},
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