{"product_id":"wossner-8229d050-piston-kit-1985-2001-honda-cr500r-0-50mm","title":"Wossner 8229D050 Piston Kit - 1985-2001 Honda CR500R +0.50mm","description":"\u003ch3\u003eWossner 8229D050 Premium Forged 2-Stroke Piston Kit - +0.50mm Oversize\u003c\/h3\u003e\n\n\u003cp\u003eTame the legendary power of the Honda CR500R with the precision of a Wossner 8229D050 Piston Kit. Engineered for the 1985-2001 Honda CR500R, this +0.50mm oversize kit is the definitive choice for riders looking to restore Factory Quality compression and performance to a cylinder that requires an overbore. At Moto-House MX, we provide the heavy-duty forged components required to handle the massive torque and explosive power of the ultimate open-class 2-stroke.\u003c\/p\u003e\n\n\u003cp\u003eForged from aerospace-grade aluminum alloy, this piston is built to withstand the extreme mechanical loads of a 500cc single. Unlike cast pistons, Wossner’s forged design offers superior thermal stability and structural strength, which is vital for an engine known for its vibration and heat. The permanent skirt coating reduces friction and piston rock, resulting in a quieter engine and smoother operation. Optimized machining keeps the reciprocating mass as low as possible while reinforcing the crown for maximum durability.\u003c\/p\u003e\n\n\u003ch3\u003eTop Features: Wossner 8229D050 Piston Kit\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cb\u003e+0.50mm Oversize (89.42mm Piston):\u003c\/b\u003e Specifically designed for cylinders bored to 89.50mm to restore performance in worn or damaged sleeves.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eAerospace Forged Alloy:\u003c\/b\u003e Maximum structural integrity to handle the extreme cylinder pressures of the Honda 500cc engine.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eLow-Friction Skirt Coating:\u003c\/b\u003e Permanent coating minimizes wear and noise, essential for the large-bore CR500 piston.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eSingle-Ring Performance:\u003c\/b\u003e Optimized for reduced drag and efficient power delivery across the broad CR500 powerband.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eComplete Kit:\u003c\/b\u003e Includes everything needed for a top-end refresh: forged piston, ring, wrist pin, and clips.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cb\u003eExpert Pro-Tip:\u003c\/b\u003e Rebuilding a CR500R requires attention to detail due to its massive displacement. When boring your cylinder for this +0.50mm kit, ensure your machinist has the piston in hand to verify the final hone to exactly 89.50mm. Always inspect your decompression mechanism (if applicable) and exhaust flange for leaks to ensure the engine starts and runs perfectly.\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\u003e1985-2001\u003c\/td\u003e\n            \u003ctd\u003eHonda\u003c\/td\u003e\n            \u003ctd\u003eCR500R\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: Does this require my cylinder to be bored?\u003c\/b\u003e\u003cbr\u003e\nA: Yes, this is an oversize piston (+0.50mm). Your cylinder must be professionally bored and honed to 89.50mm to accommodate this piston.\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, pin, and clips. Because of the heavy loads on a CR500 small-end bearing, we strongly recommend purchasing a new high-quality bearing separately.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eQ: Why choose a forged piston for a CR500?\u003c\/b\u003e\u003cbr\u003e\nA: The CR500 generates significant heat and vibration. A forged piston is much stronger than a cast one, making it far more resistant to \"shattering\" or fatigue-related failure in such a high-output large-bore engine.\u003c\/p\u003e\n\n\u003ch3\u003eRecommended Pairings\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cb\u003eComplete Top End Gasket Set:\u003c\/b\u003e Ensure a total seal for your high-compression 500cc 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 Honda’s legendary power 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 8229D050 Piston Kit\",\n  \"image\": [],\n  \"description\": \"Premium Wossner 8229D050 Oversize (+0.50mm) Forged 2-Stroke Piston Kit for 1985-2001 Honda CR500R. 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