{"product_id":"wossner-8154da-piston-kit-honda-cr250r-1978-1980-atc250r-1981-1984","title":"Wossner 8154DA Piston Kit - Honda CR250R (1978-1980) ATC250R (1981-1984)","description":"\u003ch3\u003eWossner 8154DA Premium Forged 2-Stroke Piston Kit - Standard Size A\u003c\/h3\u003e\n\n\u003cp\u003eRevitalize your vintage Honda 2-stroke with the precision and durability of the Wossner 8154DA Piston Kit. Specifically engineered for the 1978-1980 Honda CR250R and the 1981-1984 Honda ATC250R, this Standard Size A kit is the ultimate choice for restoring Factory Quality power to these legendary machines. At Moto-House MX, we specialize in providing high-performance forged components that keep classic off-road and ATV engines performing like new.\u003c\/p\u003e\n\n\u003cp\u003eForged from aerospace-grade aluminum alloy, this piston offers a significant upgrade in structural integrity and heat resistance compared to original cast pistons. The permanent skirt coating is a standout feature, reducing internal friction and piston rock for a quieter engine and smoother power delivery across the RPM range. With optimized machining that balances lightweight performance with reinforced strength in the crown and skirt walls, the 8154DA ensures your vintage Honda remains reliable on the track or trail.\u003c\/p\u003e\n\n\u003ch3\u003eTop Features: Wossner 8154DA Piston Kit\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cb\u003eStandard Size A (69.94mm Piston):\u003c\/b\u003e Precision-engineered for the standard 70.00mm bore to restore peak compression and performance.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eAerospace Forged Alloy:\u003c\/b\u003e Premium aluminum construction provides superior durability for high-performance vintage racing.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003ePermanent Skirt Coating:\u003c\/b\u003e Minimizes friction and engine noise for smoother operation and an efficient break-in period.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eDual-Ring Design:\u003c\/b\u003e Optimized for a reliable combustion seal and consistent power delivery in 250cc air-cooled and early liquid-cooled engines.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eComplete Assembly:\u003c\/b\u003e Kit includes the forged piston, high-performance rings, wrist pin, and clips.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cb\u003eExpert Pro-Tip:\u003c\/b\u003e When rebuilding these classic Honda engines, always ensure your cylinder bore is within factory service limits and free of heavy glazing. For the ATC250R and early CR250R, checking your air intake boot for cracks and ensuring a fresh top-end gasket kit is used will prevent lean conditions that can damage a new forged piston.\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; Notes\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e1978-1980\u003c\/td\u003e\n            \u003ctd\u003eHonda\u003c\/td\u003e\n            \u003ctd\u003eCR250R (Off-Road)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e1981-1984\u003c\/td\u003e\n            \u003ctd\u003eHonda\u003c\/td\u003e\n            \u003ctd\u003eATC250R (ATV)\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: Is this a Standard Size piston?\u003c\/b\u003e\u003cbr\u003e\nA: Yes, this is the 69.94mm piston designed for the standard 70.00mm bore. If your cylinder has been bored over to clean up damage, you will need an oversize kit.\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 whenever you perform a top-end refresh on a vintage engine.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eQ: Will this fit the liquid-cooled 1985-1986 ATC250R?\u003c\/b\u003e\u003cbr\u003e\nA: No, this kit is specifically designed for the earlier 1981-1984 ATC250R and the 1978-1980 CR250R engine platforms.\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 Premium synthetic protection specifically formulated for high-performance 2-strokes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eRestore your vintage Honda’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 8154DA Piston Kit\",\n  \"image\": [],\n  \"description\": \"Premium Wossner 8154DA Forged 2-Stroke Piston Kit for 1978-1980 Honda CR250R and 1981-1984 ATC250R. 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