{"product_id":"drt-cylinder-head-dome-insert-only-yamaha-yz125x-2005","title":"DRT Cylinder Head Dome Insert ONLY - YAMAHA YZ125(X) 2005+","description":"\u003cp\u003eDRT Cylinder Head Dome Insert Yamaha YZ125(X) 2005+\u003c\/p\u003e\n\u003cp class=\"p1\"\u003eDRT cylinder heads are the cutting edge of cylinder head design, offering optimized performance for every riding style. Proudly designed and manufactured in the United States!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cstrong\u003eBenefits compared to stock:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Optimized performance: more power where you need it, when you need it\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Choose between 3 dome insert options. Order one, two, or all 3 to unlock full control over the feel of your engine. Each dome offers very different power delivery characteristics!\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Increased detonation resistance: more efficient combustion gains performance while also increasing reliability\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e-Better cooling: targeted heat removal where 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. 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","brand":"DRT","offers":[{"title":"Default Title","offer_id":43770098548839,"sku":null,"price":110.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1056\/5310\/files\/DRT-DM842-R1A.jpg?v=1778905733","url":"https:\/\/berad-products.myshopify.com\/products\/drt-cylinder-head-dome-insert-only-yamaha-yz125x-2005","provider":"BeRAD Moto","version":"1.0","type":"link"}