{"product_id":"wossner-8547da-piston-kit-ktm-520-525-exc-sx-beta-rr-polaris-outlaw-525","title":"Wossner 8547DA Piston Kit - KTM 520 525 EXC\/SX Beta RR Polaris Outlaw 525","description":"\u003ch3\u003eWossner 8547DA Premium Series Forged 4-Stroke Piston Kit - Standard Size A\u003c\/h3\u003e\n\n\u003cp\u003eRevitalize the legendary RFS power plant in your KTM, Beta, or Polaris with the Wossner 8547DA Piston Kit. Specifically engineered for the high-torque 520cc and 525cc 4-stroke engines, this Premium Series forged kit is the professional choice for restoring Factory Quality performance. At Moto-House MX, we understand the longevity and versatility of these engines; Wossner’s aerospace-grade forged components provide the enhanced durability needed for everything from motocross racing to long-distance adventure touring.\u003c\/p\u003e\n\n\u003cp\u003eForged from aerospace-grade aluminum alloy, the 8547DA maintains a reliable 11.0:1 compression ratio, mirroring the versatile power delivery these machines are known for. This piston includes advanced radial boss machining and enhanced oiling slots for superior wrist pin lubrication—a critical upgrade for ensuring engine longevity under heavy loads. The permanent skirt coating reduces internal friction and piston rock, providing a quieter-running engine and a safer break-in period.\u003c\/p\u003e\n\n\u003ch3\u003eTop Features: Wossner 8547DA Piston Kit\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cb\u003eStandard Size A (94.95mm Piston):\u003c\/b\u003e Precision-engineered for 95.00mm bores to maintain factory-spec clearances and efficiency.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003e11.0:1 Compression Ratio:\u003c\/b\u003e Balanced design that delivers smooth, tractable power while remaining reliable for dual-sport and ATV applications.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003ePremium Series Forging:\u003c\/b\u003e High-strength aluminum construction offers superior thermal resistance compared to cast pistons.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eEnhanced Lubrication:\u003c\/b\u003e Specialized oiling slots and annular grooves ensure the wrist pin stays lubricated during high-load operation.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eLow-Friction Skirt Coating:\u003c\/b\u003e Permanent coating minimizes drag and protects 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 KTM RFS engine is world-renowned for its durability, but at this stage in its life, a high-quality top-end refresh is the best way to prevent catastrophic failure. When installing the 8547DA, always inspect your intake and exhaust valves for wear and ensure your cam chain is within service limits. Using a fresh top-end gasket kit and premium synthetic oil is essential to protect your investment and maintain peak compression for years to come.\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\u003eBrand\u003c\/th\u003e\n            \u003cth\u003eModels\u003c\/th\u003e\n            \u003cth\u003eYear Range\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e\u003cb\u003eKTM\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003e520 SX \/ EXC | 525 SX \/ EXC \/ MXC \/ SMR \/ XC-G\u003c\/td\u003e\n            \u003ctd\u003e2000-2007\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e\u003cb\u003eKTM (ATV)\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003e525 XC ATV\u003c\/td\u003e\n            \u003ctd\u003e2008-2012\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e\u003cb\u003ePolaris\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003eOutlaw 525 (S \u0026amp; IRS)\u003c\/td\u003e\n            \u003ctd\u003e2007-2011\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e\u003cb\u003eBeta\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003e525 RR 4T\u003c\/td\u003e\n            \u003ctd\u003e2005-2009\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 94.95mm piston designed for the standard 95.00mm bore. It is the correct choice for cylinders that are still within factory service limits.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eQ: Does this kit include the gaskets?\u003c\/b\u003e\u003cbr\u003e\nA: No, the kit includes the forged piston, rings, wrist pin, and locks. A top-end gasket kit is sold separately and is required for a professional reassembly.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eQ: Can I use this in my Polaris Outlaw 525?\u003c\/b\u003e\u003cbr\u003e\nA: Absolutely. The Polaris Outlaw 525 uses the KTM-sourced RFS engine, making this Wossner kit a perfect high-performance replacement for the OEM piston.\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 Required for a professional, leak-free engine rebuild.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eMotorex Cross Power 4T Oil:\u003c\/b\u003e The ideal synthetic lubrication for high-performance KTM and Beta 4-stroke engines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eRestore your engine’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 8547DA Piston Kit\",\n  \"image\": [],\n  \"description\": \"Premium Wossner 8547DA Forged 4-Stroke Piston Kit for KTM 520\/525, Polaris Outlaw 525, and Beta 525. 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