{"product_id":"wossner-8582db-piston-kit-2004-2006-suzuki-rmz250-2004-2005-kawasaki-kx250f","title":"Wossner 8582DB Piston Kit - 2004-2006 Suzuki RMZ250 \/ 2004-2005 Kawasaki KX250F","description":"\u003ch3\u003eWossner 8582DB Premium Forged 4-Stroke Piston Kit - Size B\u003c\/h3\u003e\n\n\u003cp\u003eRefresh the power of your 250cc racer with the Wossner 8582DB Piston Kit. Specifically engineered for the early-generation Suzuki RMZ250 and Kawasaki KX250F, this Size B forged kit is the professional choice for restoring \"Factory Quality\" power in cylinders that have seen standard service. At Moto-House MX, we know these shared-platform engines require precision tolerances to maintain peak RPM reliability; Wossner’s aerospace-grade forged components provide the exact fitment needed to keep your machine competitive.\u003c\/p\u003e\n\n\u003cp\u003eForged from aerospace-grade aluminum alloy, the 8582DB maintains a reliable 12.6:1 compression ratio, providing excellent throttle response and consistent torque. Wossner incorporates advanced features like radial boss machining and enhanced oiling slots for superior wrist pin lubrication—critical for these high-revving 4-stroke engines. The permanent skirt coating minimizes internal friction and piston rock, resulting in a quieter engine and a more efficient break-in. This Size B piston (76.97mm) is precision-matched for 77.01mm bores, perfect for an engine refresh that compensates for standard cylinder wear.\u003c\/p\u003e\n\n\u003ch3\u003eTop Features: Wossner 8582DB Piston Kit\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cb\u003eSize B (76.97mm):\u003c\/b\u003e Precision-engineered for 77.01mm bores, providing the correct piston-to-wall clearance for seasoned cylinders.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003e12.6:1 Compression Ratio:\u003c\/b\u003e Delivers a perfect balance of increased performance and long-term mechanical reliability.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eAerospace Forged Alloy:\u003c\/b\u003e Significantly stronger and more heat-resistant than OEM cast pistons, ideal for high-RPM motocross use.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eEnhanced Lubrication Design:\u003c\/b\u003e Radial boss machining and annular grooves ensure the wrist pin stays lubricated during intense racing conditions.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eLow-Friction Skirt Coating:\u003c\/b\u003e Reduces drag and mechanical noise while protecting your cylinder walls from premature wear.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eComplete Assembly:\u003c\/b\u003e Kit includes the forged piston, high-performance rings, wrist pin, and pin locks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cb\u003eExpert Pro-Tip:\u003c\/b\u003e The 2004-2006 RMZ and KXF engines were the pioneers of the modern 250F class. Because these engines can run quite hot, a high-quality forged piston is a vital upgrade over stock. Size B is the preferred choice for a top-end refresh when your cylinder is still in good condition but has worn slightly beyond the ideal clearance for a Size A piston. When rebuilding, always inspect your valve train and cam chain, and use a fresh top-end gasket kit to ensure a professional-grade 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\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e2004-2006\u003c\/td\u003e\n            \u003ctd\u003eSuzuki\u003c\/td\u003e\n            \u003ctd\u003eRMZ250\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e2004-2005\u003c\/td\u003e\n            \u003ctd\u003eKawasaki\u003c\/td\u003e\n            \u003ctd\u003eKX250F\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 benefit of Size B over Size A?\u003c\/b\u003e\u003cbr\u003e\nA: Size B (76.97mm) is 0.01mm larger than Size A. This slight increase is designed to compensate for the natural, microscopic wear that occurs on a cylinder wall over time, restoring the engine to original factory performance and compression levels.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eQ: Does this kit include the gasket set?\u003c\/b\u003e\u003cbr\u003e\nA: No, the kit includes the forged piston, rings, wrist pin, and locks. A complete top-end gasket set is sold separately and is essential for a professional engine rebuild.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eQ: Is Wossner better than the stock piston?\u003c\/b\u003e\u003cbr\u003e\nA: Yes, Wossner forged pistons are denser and stronger than OEM cast parts. They are specifically designed to handle the thermal and mechanical stresses of racing more effectively than standard cast pistons.\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 professional, leak-free seal and proper compression.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eMotorex Cross Power 4T Oil:\u003c\/b\u003e Premium synthetic lubrication to protect your high-performance 4-stroke engine.\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 8582DB Piston Kit\",\n  \"image\": [],\n  \"description\": \"Premium Wossner 8582DB Forged 4-Stroke Piston Kit for Suzuki RMZ250 and Kawasaki KX250F. 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