{"product_id":"wossner-8691d050-piston-kit-polaris-sportsman-scrambler-ranger-500-0-50mm","title":"Wossner 8691D050 Piston Kit - Polaris Sportsman Scrambler Ranger 500 (+0.50mm)","description":"\u003ch3\u003eWossner 8691D050 Premium Forged 4-Stroke Piston Kit - +0.50mm Oversize\u003c\/h3\u003e\n\n\u003cp\u003eRestore the power and reliability of your Polaris 500cc engine with the Wossner 8691D050 Piston Kit. This +0.50mm oversize kit is specifically designed for Polaris Sportsman, Scrambler, and Ranger 500 models spanning nearly two decades of production. At Moto-House MX, we provide the precision-forged components needed to breathe new life into worn cylinders, ensuring your ATV or UTV remains a workhorse on the trail or the job site.\u003c\/p\u003e\n\n\u003cp\u003eForged from aerospace-grade aluminum alloy, this piston offers superior strength and thermal stability compared to standard cast replacements. The 8691D050 features advanced radial boss machining and enhanced oiling slots for improved wrist pin lubrication, which is vital for engine longevity in high-load utility environments. With a 10.3:1 compression ratio and a permanent skirt coating to reduce friction, this kit delivers a quieter-running engine and a more efficient break-in period.\u003c\/p\u003e\n\n\u003ch3\u003eTop Features: Wossner 8691D050 Piston Kit\u003c\/h3\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cb\u003eOversize +0.50mm (92.45mm Piston):\u003c\/b\u003e Precision-engineered for 92.50mm bores, perfect for cleaning up worn or damaged cylinder walls.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eAerospace Forged Alloy:\u003c\/b\u003e Provides maximum structural integrity to handle the mechanical stress of heavy-duty utility and off-road use.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eAdvanced Lubrication Design:\u003c\/b\u003e Radial boss machining and annular grooves ensure consistent oil delivery to the wrist pin for reduced wear.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eLow-Friction Skirt Coating:\u003c\/b\u003e Permanent coating minimizes internal drag and piston rock for smoother, quieter operation.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eImproved Ring Seal:\u003c\/b\u003e Specialized ring land treatment enhances oil control and maintains peak combustion efficiency.\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 Polaris 500 engine is a legend for its longevity, but after years of service, cylinder bores can become oval or scratched. This +0.50mm kit is the professional solution for an engine rebuild that requires boring. Always have your cylinder bored and honed by a qualified machinist to match this specific 92.45mm piston size for the correct piston-to-wall clearance.\u003c\/p\u003e\n\n\u003ch3\u003eFitment List (Partial)\u003c\/h3\u003e\n\u003ctable border=\"1\" cellpadding=\"8\" style=\"width: 100%; border-collapse: collapse;\"\u003e\n    \u003cthead\u003e\n        \u003ctr\u003e\n            \u003cth\u003eModel Group\u003c\/th\u003e\n            \u003cth\u003eYear Range\u003c\/th\u003e\n            \u003cth\u003eVehicle Type\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e\u003cb\u003ePolaris Sportsman 500 \/ HO \/ EFI\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003e1996-2013\u003c\/td\u003e\n            \u003ctd\u003eATV\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e\u003cb\u003ePolaris Scrambler 500 4x4 \/ 2x4\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003e1997-2012\u003c\/td\u003e\n            \u003ctd\u003eATV\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e\u003cb\u003ePolaris Ranger 500 \/ EFI \/ 4x4 \/ 6x6\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003e2004-2013\u003c\/td\u003e\n            \u003ctd\u003eUTV\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003e\u003cb\u003ePolaris Magnum \/ ATP \/ Xplorer 500\u003c\/b\u003e\u003c\/td\u003e\n            \u003ctd\u003e1997-2005\u003c\/td\u003e\n            \u003ctd\u003eATV\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: No, this is an \u003cb\u003eOversize (+0.50mm)\u003c\/b\u003e piston. Your cylinder must be bored and honed to 92.50mm to accommodate this kit.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eQ: Does this kit include a gasket set?\u003c\/b\u003e\u003cbr\u003e\nA: No, the kit includes the forged piston, rings, wrist pin, and pin locks. A complete engine gasket set is required for a professional rebuild and is sold separately.\u003c\/p\u003e\n\n\u003cp\u003e\u003cb\u003eQ: Why choose forged over cast for a utility ATV?\u003c\/b\u003e\u003cbr\u003e\nA: Forged pistons are denser and stronger, making them much more resistant to cracking under the heavy thermal loads often seen in utility work or technical trail riding.\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 leak-free reassembly.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cb\u003eHigh-Performance 4-Stroke Engine Oil:\u003c\/b\u003e Keep your new forged piston protected with premium lubrication.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eRestore your Polaris to its prime. 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 8691D050 Piston Kit\",\n  \"image\": [],\n  \"description\": \"Premium Wossner 8691D050 Forged 4-Stroke Piston Kit for Polaris 500cc engines. Oversize +0.50mm (92.45mm) for 92.50mm bore. 10.3:1 compression.\",\n  \"sku\": \"8691D050\",\n  \"brand\": {\n    \"@type\": \"Brand\",\n    \"name\": \"Wossner\"\n  },\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"url\": \"https:\/\/motohousemx.com\/products\/wossner-8691d050-piston-kit\",\n    \"priceCurrency\": \"USD\",\n    \"availability\": \"https:\/\/schema.org\/InStock\"\n  }\n}\n\u003c\/script\u003e","brand":"WOSSNER","offers":[{"title":"Default Title","offer_id":44496002809939,"sku":"8691D050","price":194.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1754\/5421\/files\/1490887.png?v=1776230328","url":"https:\/\/motohousemx.com\/products\/wossner-8691d050-piston-kit-polaris-sportsman-scrambler-ranger-500-0-50mm","provider":"Moto-House MX","version":"1.0","type":"link"}