{"product_id":"wossner-8873db-piston-kit-ktm-husqvarna-gas-gas-450-sx-f-fc450-mc-450f-size-b","title":"Wossner 8873DB Piston Kit - KTM Husqvarna Gas Gas 450 SX-F FC450 MC 450F Size B","description":"\u003ch3\u003eWossner 8873DB Pro Series Forged 4-Stroke Piston Kit - Standard Size B\u003c\/h3\u003e\n\n\u003cp\u003eMaintain the elite performance of your 450cc powerhouse with the Wossner 8873DB Piston Kit. Precision-engineered for the modern KTM, Husqvarna, and Gas Gas 450 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 machines are the pinnacle of motocross engineering; Wossner’s Pro Series forging provides a high-strength, lightweight solution that sustains a potent 13.6:1 compression ratio, ensuring your bike keeps its aggressive power delivery and lightning-fast throttle response.\u003c\/p\u003e\n\n\u003cp\u003eThe 8873DB is a masterclass in 4-stroke durability, featuring a double-bridged forging design that provides incredible structural integrity for high-RPM racing. To ensure your engine survives the heat of a long moto, 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 95.01mm bores, this 94.96mm Size B kit restores your engine to the tight mechanical tolerances needed for maximum horsepower.\u003c\/p\u003e\n\n\u003ch3\u003eTop Features: Wossner 8873DB Piston Kit\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cb\u003eStandard Size B (94.96mm):\u003c\/b\u003e Specifically designed for 95.01mm bores to compensate for minor cylinder wear and restore factory-correct clearances.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003e13.6:1 Compression Ratio:\u003c\/b\u003e High-compression design optimized for race-ready performance across the powerband.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003ePro 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 The KTM\/Husky\/Gas Gas 450cc engine is a high-tolerance racing machine. If you are performing a top-end refresh on a cylinder that has logged significant track time, the Size B (94.96mm) is the expert way to account for microscopic cylinder wear while maintaining a tight piston-to-wall clearance. Always use a precision bore gauge to confirm your cylinder measures 95.01mm 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\u003e2013-2022\u003c\/td\u003e\n\u003ctd\u003eKTM\u003c\/td\u003e\n\u003ctd\u003e450 SX-F \/ Factory Edition\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e2014-2022\u003c\/td\u003e\n\u003ctd\u003eKTM\u003c\/td\u003e\n\u003ctd\u003e450 XC-F\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e2013-2014\u003c\/td\u003e\n\u003ctd\u003eKTM\u003c\/td\u003e\n\u003ctd\u003e450 SMR\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e2014-2022\u003c\/td\u003e\n\u003ctd\u003eHusqvarna\u003c\/td\u003e\n\u003ctd\u003eFC450 \/ Rockstar Edition\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e2017-2022\u003c\/td\u003e\n\u003ctd\u003eHusqvarna\u003c\/td\u003e\n\u003ctd\u003eFX450\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003e2017-2021\u003c\/td\u003e\n\u003ctd\u003eHusqvarna\u003c\/td\u003e\n\u003ctd\u003eFS450\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 450F \/ Troy Lee Designs\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 450F\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 (94.96mm) 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: Does this piston fit the Rockstar and Troy Lee Designs editions?\u003c\/b\u003e\u003cbr\u003e\nA: Yes, this kit is fully compatible with the Husqvarna Rockstar Edition, KTM Factory Edition, and Gas Gas Troy Lee Designs models within the listed year ranges.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eQ: What fuel is recommended for 13.6:1 compression?\u003c\/b\u003e\u003cbr\u003e\nA: For a 13.6:1 ratio, it is highly recommended to use 91-93 octane pump gas or a race fuel blend to prevent detonation and ensure consistent engine performance.\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 8873DB Piston Kit\",\n  \"image\": [],\n  \"description\": \"Premium Wossner 8873DB Forged 4-Stroke Piston Kit for 2013-2023 KTM, Husqvarna, and Gas Gas 450cc models. 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