{"product_id":"vertex-2-stroke-cast-replica-piston-kit-1999-2024-yamaha-yz250-x","title":"Vertex 2-Stroke Cast Replica Piston Kit 1999-2024 Yamaha YZ250\/X","description":"\u003cp\u003eTired of sluggish performance? It’s time to unleash your Yamaha YZ250’s true potential with the Vertex 2-Stroke Cast Replica Piston Kit. Engineered for maximum durability, superior performance, and a factory-fresh feel, this kit is the ultimate \u003cstrong\u003eOEM Replacement\u003c\/strong\u003e your bike needs to get back in the fight. Moto-House MX provides this precision-engineered 66.34mm piston to ensure your YZ250 or YZ250X recovers the snap and throttle response you've been missing.\u003c\/p\u003e\n\u003cp\u003eVertex pistons are designed for \u003cstrong\u003eRacing Performance\u003c\/strong\u003e, utilizing a gravity-cast aluminum alloy with an 18% silicon content for an ultra-light yet \u003cstrong\u003eHeavy Duty\u003c\/strong\u003e build. Each 2-Stroke Cast Replica piston features a high-tech Molybdenum Disulfide (MoS2) coated skirt to reduce friction, resulting in a faster break-in period and significantly longer engine life. Heat-treated with T-5 hardening, these components are built to withstand the rigors of track and trail domination.\u003c\/p\u003e\n\u003ch3\u003eTop Features: Vertex Top End Piston Kit\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2-Stroke Cast Replica Design:\u003c\/strong\u003e Precisely engineered to match the original equipment for a reliable, factory-level feel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e66.34mm A-Size:\u003c\/strong\u003e Perfect for new or replated cylinders requiring a standard bore diameter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMoS2 Coated Skirts:\u003c\/strong\u003e Specialized coating reduces friction and wear while aiding in the initial break-in process.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eT-5 Hardening:\u003c\/strong\u003e Every piston undergoes a rigorous tempering process for maximum structural integrity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Rebuild Kit:\u003c\/strong\u003e Includes the 66.34mm piston, high-quality rings, wrist pin, circlips, top-end gaskets, and a wrist pin bearing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment List\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYear Range\u003c\/th\u003e\n\u003cth\u003eVehicle Brand\u003c\/th\u003e\n\u003cth\u003eVehicle Model \u0026amp; Size\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1999-2024\u003c\/td\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eYZ250\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2016-2024\u003c\/td\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eYZ250X\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is this 66.34mm piston compatible with my 2-stroke YZ250?\u003c\/strong\u003e\u003cbr\u003eA: Yes, this is specifically designed as a Cast Replica for the Yamaha YZ250\/X 2-stroke engine, maintaining OEM-style performance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Do I need to re-jet my carb after installing this piston?\u003c\/strong\u003e\u003cbr\u003eA: While designed to OEM specs, jetting adjustments may be required for optimal performance if you have other modifications like an aftermarket exhaust.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How long does it take to break in the new piston?\u003c\/strong\u003e\u003cbr\u003eA: We recommend following a proper heat-cycle break-in procedure—typically 2-3 controlled rides before engaging in sustained full-throttle use.\u003c\/p\u003e\n\u003cp\u003e❇️ Click \"Buy Now\" and give your YZ250 the power it deserves!\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMoto-House MX – Choice of Champions\u003c\/strong\u003e – is located in Clermont\/Montverde, FL. The best motocross shop in Central Florida.\u003c\/p\u003e\n\u003cp data-start=\"1926\" data-end=\"1996\" data-is-last-node=\"\"\u003e\u003ca rel=\"noopener\" title=\"Yamaha YZ250 and YZ250X Performance Parts Collection at Moto-House MX\" href=\"https:\/\/2eoaioes7zy7lvnh-17545421.shopifypreview.com\/collections\/to-house-mx\" target=\"_blank\"\u003e\u003cstrong data-start=\"1929\" data-end=\"1991\"\u003eYamaha YZ250 and YZ250X Performance Parts Collection\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e","brand":"Vertex","offers":[{"title":"A Piston, Top End Kit","offer_id":39964607971411,"sku":"VTK22584A-2","price":218.9,"currency_code":"USD","in_stock":true},{"title":"B Piston, Top End Kit","offer_id":39964608004179,"sku":"VTK22584B-2","price":212.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/vertex-top-end-piston-kit-1999-2023-yamaha-yz250-2016-2023-yz250x-865580.jpg?v=1738047877","url":"https:\/\/motohousemx.com\/products\/vertex-2-stroke-cast-replica-piston-kit-1999-2024-yamaha-yz250-x","provider":"Moto-House MX","version":"1.0","type":"link"}