{"product_id":"wossner-8104dc-piston-kit-2002-2026-yamaha-yz85-2-stroke-size-c","title":"Wossner 8104DC Piston Kit - 2002-2026 Yamaha YZ85 2-Stroke Size C","description":"\u003ch3\u003eWossner 8104DC Premium Forged 2-Stroke Piston Kit - Size C\u003c\/h3\u003e\n\n\u003cp\u003eKeep your mini-racer at the front of the pack with the Wossner 8104DC Piston Kit. Specifically engineered for 2002-2026 Yamaha YZ85 cylinders that require a Size C fitment, this kit is designed to restore Factory Quality power and high-RPM reliability. At Moto-House MX, we understand that small-bore racing engines demand absolute precision, which is why we provide Wossner’s aerospace-grade forged components to keep your Yamaha 85cc engine performing at its peak.\u003c\/p\u003e\n\n\u003cp\u003eForged from premium aluminum alloy, this piston offers superior structural integrity and heat resistance compared to standard cast pistons. The permanent skirt coating is a vital feature, reducing internal friction and piston rock for a quieter engine and improved mechanical longevity. This Size C piston (47.47mm) is designed for cylinders with a 47.52mm bore, providing the precise clearances needed for optimal compression and power delivery in seasoned cylinders.\u003c\/p\u003e\n\n\u003ch3\u003eTop Features: Wossner 8104DC Piston Kit\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cb\u003eStandard Size C (47.47mm):\u003c\/b\u003e Precision-engineered for 47.52mm bores to maintain perfect tolerances in used cylinders.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eAerospace Forged Alloy:\u003c\/b\u003e Maximum durability and thermal stability, built to withstand the high RPMs of competitive motocross.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eLow-Friction Skirt Coating:\u003c\/b\u003e Permanent coating reduces wear and mechanical noise for a more efficient engine.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eSingle-Ring Racing Design:\u003c\/b\u003e Optimized for reduced drag and maximum high-RPM efficiency in the 85cc class.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eComplete Assembly:\u003c\/b\u003e Kit includes the forged piston, high-quality ring, wrist pin, and clips.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cb\u003eExpert Pro-Tip:\u003c\/b\u003e The Yamaha YZ85 is a high-performance machine that rewards proactive maintenance. Size C is the ideal selection for a cylinder that has seen standard use, as it compensates for the natural microscopic wear of the Nikasil plating. To ensure maximum performance, always inspect your power valve assembly and use a new top-end gasket kit for a perfect seal.\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 \u0026amp; Size\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e2002-2026\u003c\/td\u003e\n            \u003ctd\u003eYamaha\u003c\/td\u003e\n            \u003ctd\u003eYZ85\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: What is the difference between Size A, B, and C?\u003c\/b\u003e\u003cbr\u003e\nA: Size C (47.47mm) is slightly larger than Size A or B. This allows you to maintain the factory-specified piston-to-wall clearance as the cylinder wall experiences natural wear over time, preventing power loss and ensuring long-term reliability.\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, ring, wrist pin, and clips. We highly recommend purchasing a new small-end bearing separately whenever you perform a top-end refresh on an 85cc racer.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eQ: Will this fit my 2026 YZ85?\u003c\/b\u003e\u003cbr\u003e\nA: Yes, this piston kit is fully compatible with the 2002 through 2026 model year Yamaha YZ85 series.\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.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eMotorex Cross Power 2T Oil:\u003c\/b\u003e The ultimate synthetic lubrication choice for high-performance Yamaha 2-strokes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eRestore your Yamaha’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 8104DC Piston Kit\",\n  \"image\": [],\n  \"description\": \"Premium Wossner 8104DC Forged 2-Stroke Piston Kit for 2002-2026 Yamaha YZ85. Size C (47.47mm) for 47.52mm bores. Features single-ring racing design.\",\n  \"sku\": \"8104DC\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"Wossner\"\n  },\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"url\": \"https:\/\/motohousemx.com\/products\/wossner-8104dc-piston-kit\",\n    \"priceCurrency\": \"USD\",\n    \"availability\": \"https:\/\/schema.org\/InStock\"\n  }\n}\n\u003c\/script\u003e","brand":"WOSSNER","offers":[{"title":"Default Title","offer_id":44496004055123,"sku":"8104DC","price":112.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/59609.png?v=1776230418","url":"https:\/\/motohousemx.com\/products\/wossner-8104dc-piston-kit-2002-2026-yamaha-yz85-2-stroke-size-c","provider":"Moto-House MX","version":"1.0","type":"link"}