{"product_id":"wossner-8216dc-piston-kit-1999-2026-yamaha-yz250-yz250x-size-c","title":"Wossner 8216DC Piston Kit - 1999-2026 Yamaha YZ250 \/ YZ250X Size C","description":"\u003ch3\u003eWossner 8216DC Premium Forged 2-Stroke Piston Kit - Size C\u003c\/h3\u003e\n\n\u003cp\u003eMaintain the peak performance of your Yamaha 2-stroke with the Wossner 8216DC Piston Kit. Specifically engineered for the Yamaha YZ250 and the cross-country YZ250X, this Size C forged kit is the professional choice for restoring Factory Quality power in cylinders that have seen significant service. At Moto-House MX, we know that the YZ250 is a legend of reliability; Wossner’s aerospace-grade forged components provide the precision fitment needed to keep these iconic machines running strong.\u003c\/p\u003e\n\n\u003cp\u003eForged from aerospace-grade aluminum alloy, this piston offers superior structural integrity and heat resistance compared to standard cast alternatives. The 8216DC features a permanent skirt coating to minimize friction and piston rock, ensuring a quieter engine and smoother throttle response. This Size C piston (66.37mm) is precision-matched for cylinders with a 66.42mm bore, providing the exact clearances required for optimal compression and power delivery in older or higher-hour cylinders.\u003c\/p\u003e\n\n\u003ch3\u003eTop Features: Wossner 8216DC Piston Kit\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cb\u003eStandard Size C (66.37mm):\u003c\/b\u003e Precision-engineered for 66.42mm bores to maintain perfect factory-spec tolerances in cylinders with moderate wear.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eAerospace Forged Alloy:\u003c\/b\u003e High-strength aluminum construction built to withstand the mechanical stress of high-RPM 2-stroke racing.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eLow-Friction Skirt Coating:\u003c\/b\u003e Permanent coating reduces wear on the cylinder walls and provides a quieter engine operation.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eDual-Ring Design:\u003c\/b\u003e Optimized for a consistent combustion seal and improved heat transfer for sustained power throughout your ride.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eComplete Assembly:\u003c\/b\u003e Kit includes the forged piston, high-quality rings, wrist pin, and clips.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cb\u003eExpert Pro-Tip:\u003c\/b\u003e The Yamaha YZ250 engine is incredibly durable, but Nikasil cylinder plating does experience gradual wear over hundreds of hours of use. Size C is the ideal choice for an engine refresh where the cylinder is still within service limits but has worn beyond the ideal clearance for Size A or B pistons. When rebuilding, always inspect your power valve assembly for carbon buildup and replace your small-end bearing to ensure a professional-grade top-end service.\u003c\/p\u003e\n\n\u003ch3\u003eFitment List\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" style=\"width: 100%; border-collapse: collapse;\"\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\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e1999-2026\u003c\/td\u003e\n            \u003ctd\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003eYZ250\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e2016-2026\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\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eQ: When should I choose Size C?\u003c\/b\u003e\u003cbr\u003e\nA: Size C (66.37mm) is 0.02mm larger than Size A. It is used to compensate for natural cylinder wear on high-hour engines. Using a Size C piston restores the proper piston-to-wall clearance, preventing \"piston slap\" and extending the life of your cylinder.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eQ: Does this fit the YZ250X woods model?\u003c\/b\u003e\u003cbr\u003e\nA: Yes, the YZ250X uses the same bore and piston configuration as the YZ250 motocross model, making this kit a perfect fit for both machines.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eQ: Does this kit include the wrist pin bearing?\u003c\/b\u003e\u003cbr\u003e\nA: No, the kit includes the piston, rings, pin, and clips. We highly recommend purchasing a new small-end bearing separately for every top-end rebuild to prevent premature failure.\u003c\/p\u003e\n\n\u003ch3\u003eRecommended Pairings\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cb\u003eTop End Gasket Kit:\u003c\/b\u003e Essential for a professional, leak-free engine rebuild with a fresh set of gaskets.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eMotorex Cross Power 2T Oil:\u003c\/b\u003e Premium synthetic protection specifically formulated for high-performance 250cc 2-strokes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eRestore your machine’s power and precision today. Buy now at Moto-House MX!\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eMoto-House MX – Choice of Champions\u003c\/b\u003e – is located in Clermont\/Montverde, FL. The Best Motocross\/UTV \u0026amp; ATV Shop in Central Florida. Stop by our local store in Montverde, FL or enjoy lightning-fast shipping across the USA.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"Wossner 8216DC Piston Kit\",\n  \"image\": [],\n  \"description\": \"Premium Wossner 8216DC Forged 2-Stroke Piston Kit for 1999-2026 Yamaha YZ250 and YZ250X. Size C (66.37mm) for 66.42mm bore. 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