{"product_id":"wossner-8923db-piston-kit-ktm-husqvarna-gas-gas-250-sx-f-fc250-mc-250f-size-b","title":"Wossner 8923DB Piston Kit - KTM Husqvarna Gas Gas 250 SX-F FC250 MC 250F Size B","description":"\u003ch3\u003eWossner 8923DB Premium Series Forged 4-Stroke Piston Kit - Standard Size B\u003c\/h3\u003e\n\n\u003cp\u003ePush your 250cc engine to its absolute limit with the Wossner 8923DB Piston Kit. Precision-engineered for the modern KTM, Husqvarna, and Gas Gas 250 range, this Standard Size B forged kit is the professional choice for riders performing a top-end refresh on cylinders with moderate hours. At Moto-House MX, we know these high-revving 4-strokes demand perfection; Wossner’s Premium Series forging provides a high-strength, lightweight solution that sustains a massive 14.4:1 compression ratio, ensuring your bike delivers elite-level power and aggressive throttle response.\u003c\/p\u003e\n\n\u003cp\u003eThe 8923DB is a masterclass in small-bore performance, featuring a double-bridged forging design that provides incredible structural integrity for engines that spend their life at the rev limiter. To ensure your engine survives the heat of professional-level racing, Wossner has integrated enhanced piston pin oiling slots and radial boss machining for superior wrist pin lubrication. The piston skirt is treated with a permanent molybdenum disulphide coating to reduce friction and improve break-in performance. Precision-machined for 78.01mm bores, this 77.97mm Size B kit restores your engine to the tight mechanical tolerances needed for championship-winning horsepower.\u003c\/p\u003e\n\n\u003ch3\u003eTop Features: Wossner 8923DB Piston Kit\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cb\u003eStandard Size B (77.97mm):\u003c\/b\u003e Specifically designed for 78.01mm bores to compensate for minor cylinder wear and restore factory-correct clearances.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eUltra-High 14.4:1 Compression:\u003c\/b\u003e Engineered to maximize combustion efficiency and torque across the entire RPM range.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003ePremium Series Forging:\u003c\/b\u003e Advanced double-bridged design offers superior strength and heat resistance compared to standard cast alternatives.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eEnhanced Lubrication System:\u003c\/b\u003e Features specialized oiling slots and annular grooves to ensure consistent wrist pin lubrication under extreme thermal loads.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eLow-Friction Skirt Coating:\u003c\/b\u003e Permanent skirt treatment reduces internal drag, protects the cylinder wall, and ensures a smoother break-in.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eComplete Kit:\u003c\/b\u003e Includes the high-performance forged Size B piston, rings, wrist pin, and pin locks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cb\u003eExpert Pro-Tip:\u003c\/b\u003e Small-bore 250cc race engines are high-tolerance machines. If you are performing a top-end refresh on a cylinder that has logged significant track time, the Size B (77.97mm) is the expert way to account for microscopic cylinder wear while maintaining the tight piston-to-wall clearance required for peak performance. Always use a precision bore gauge to confirm your cylinder measures 78.01mm before installation. For a professional-grade rebuild, always install with a fresh top-end gasket kit and utilize premium synthetic oil to protect your forged assembly.\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\u003e2016-2022\u003c\/td\u003e\n\u003ctd\u003eKTM\u003c\/td\u003e\n\u003ctd\u003e250 SX-F \/ Troy Lee Designs\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e2016-2022\u003c\/td\u003e\n\u003ctd\u003eKTM\u003c\/td\u003e\n\u003ctd\u003e250 XC-F\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e2016-2022\u003c\/td\u003e\n\u003ctd\u003eHusqvarna\u003c\/td\u003e\n\u003ctd\u003eFC250\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e2021-2023\u003c\/td\u003e\n\u003ctd\u003eGas Gas\u003c\/td\u003e\n\u003ctd\u003eMC 250F\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e2021-2023\u003c\/td\u003e\n\u003ctd\u003eGas Gas\u003c\/td\u003e\n\u003ctd\u003eEX 250F\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: Why should I choose Size B instead of Size A?\u003c\/b\u003e\u003cbr\u003e\nA: Size B (77.97mm) is 0.01mm larger than Size A. It is the standard professional choice for an engine that has several hours of use to maintain the tight piston-to-wall clearance necessary for peak horsepower and to prevent piston slap.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eQ: What fuel is recommended for 14.4:1 compression?\u003c\/b\u003e\u003cbr\u003e\nA: With a very high 14.4:1 ratio, it is highly recommended to use high-quality 93 octane pump gas at a minimum, though many racers prefer a race fuel blend to ensure consistent performance and prevent detonation.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eQ: Is the wrist pin included?\u003c\/b\u003e\u003cbr\u003e\nA: Yes, this complete Wossner kit includes the forged piston, high-performance rings, the wrist pin, and the circlips.\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 Essential for ensuring a leak-free rebuild and maintaining the correct squish height.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003ePremium 4-Stroke Synthetic Oil:\u003c\/b\u003e Keep your new forged piston and valvetrain protected under high-heat racing conditions.\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 8923DB Piston Kit\",\n  \"image\": [],\n  \"description\": \"Premium Wossner 8923DB Forged 4-Stroke Piston Kit for 2016-2023 KTM, Husqvarna, and Gas Gas 250cc models. 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