{"product_id":"wiseco-pk1704-gp-series-top-end-piston-kit-2002-2025-yamaha-yz250-yz250x","title":"Wiseco PK1704 GP Series Top End Piston Kit 2002-2025 Yamaha YZ250 YZ250X","description":"\u003cp\u003eBoost your bike's endurance and performance with the Wiseco GP Series Top End Kit. If your engine is struggling with power loss during sustained high-RPM riding, Moto-House MX provides this elite kit as the ultimate \u003cstrong\u003eRacing Performance\u003c\/strong\u003e solution. Designed specifically for the Yamaha YZ250 and YZ250X, the PK1704 kit delivers the reliability needed for competitive 2-stroke racing while ensuring your top end is built to last.\u003c\/p\u003e\n\u003cp\u003eThe Wiseco GP Series features \u003cstrong\u003eHeavy Duty\u003c\/strong\u003e forged construction, engineered and machined right in the USA. These pistons undergo extra lightening operations for enhanced throttle response and feature an Electra-Coated crown, ring grooves, and pin bores for maximum wear resistance. With the addition of ArmorGlide® skirt coating, this \u003cstrong\u003eOEM Replacement\u003c\/strong\u003e protects against micro-welding, galling, and detonation, making it the premier choice for riders who demand the highest level of protection.\u003c\/p\u003e\n\u003ch3\u003eTop Features: Wiseco GP Series Top End Kit PK1704\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eForged in the USA:\u003c\/strong\u003e Precision-machined from high-tensile aluminum for superior strength compared to cast pistons.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eArmorGlide® Skirt Coating:\u003c\/strong\u003e Reduces friction and protects the cylinder wall while preventing micro-welding at high temperatures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectra-Coated Protection:\u003c\/strong\u003e Specialized coating on the crown and pin bores ensures maximum resistance to heat and wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnhanced Throttle Response:\u003c\/strong\u003e Lightened design allows for faster revving and improved power delivery across the RPM range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComprehensive Rebuild Kit:\u003c\/strong\u003e Includes a 66.40mm piston, ring set, wrist pin, circlips, top-end bearing, and a complete gasket set.\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\u003e2002-2025\u003c\/td\u003e\n\u003ctd\u003eYamaha\u003c\/td\u003e\n\u003ctd\u003eYZ250\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2016-2025\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: What makes the GP Series different from a standard Wiseco piston?\u003c\/strong\u003e\u003cbr\u003eA: The GP Series includes additional Electra-Coating and lightening operations specifically designed for the stresses of sustained high-RPM 2-stroke racing.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Is the top-end bearing included in this kit?\u003c\/strong\u003e\u003cbr\u003eA: Yes, the PK1704 kit is a complete solution and includes the high-quality wrist pin bearing alongside the gaskets and piston components.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Will this fit my 2025 Yamaha YZ250?\u003c\/strong\u003e\u003cbr\u003eA: Absolutely. This kit is updated for fitment on all YZ250 models from 2002 through the current 2025 model year.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUpgrade Your Ride\u003c\/strong\u003e and experience the difference of Wiseco forged technology today!\u003c\/p\u003e\n\u003cp\u003eMoto-House MX – \u003cstrong\u003eChoice of Champions\u003c\/strong\u003e – is located in Clermont\/Montverde, FL. The best motocross shop in Central Florida.\u003c\/p\u003e\n\u003cp\u003e\u003ca title=\"Yamaha YZ250 \/ YZ250X PERFORMANCE UPGRADES ENGINE MODS ACCESSORIES | MOTO-HOUSE MX\" href=\"https:\/\/motohousemx.com\/collections\/yamaha-yz250-performance-upgrades-engine-mods-and-accessories-moto-house-mx\" target=\"_blank\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eClick to see all the other performance parts for your Yamaha YZ250 \/ YZ250X\u003c\/strong\u003e\u003c\/a\u003e\u003c\/p\u003e\n\u003c!----\u003e","brand":"Wiseco","offers":[{"title":"Default Title","offer_id":42091736924243,"sku":"PK1704","price":263.05,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/wiseco-gp-series-top-end-kit-pk1704-6640-mm-2002-2023-yamaha-yz250-and-yz250x-377494.jpg?v=1738049265","url":"https:\/\/motohousemx.com\/products\/wiseco-pk1704-gp-series-top-end-piston-kit-2002-2025-yamaha-yz250-yz250x","provider":"Moto-House MX","version":"1.0","type":"link"}