{"product_id":"wiseco-100-50-mm-yamaha-yfm660-piston-kit-4966m10050","title":"Wiseco 100.50 mm Yamaha YFM660 Piston Kit 4966M10050","description":"The Wiseco team has remained at the forefront of powersports performance through every era and evolution, including the development of high-performance 4-strokes.  Today, Wiseco's forged 4-stroke pistons are designed for each specific engine application and built to the tightest tolerances for the ultimate combination of performance and strength. Proven at every level of riding, Wiseco 4-stroke pistons are ready to deliver the power and reliability you're looking for.\n100.50 mm Bore - 9.9:1 CR\n\u003cul\u003e\n  \u003cli\u003eImproved tensile strength of forged material optimizes strength and service life\u003c\/li\u003e\n  \u003cli\u003eDesigned and built for each specific 4-stroke powersports engine\u003c\/li\u003e\n  \u003cli\u003eDedicated forgings allow for optimized strength-to-weight ratio\u003c\/li\u003e\n  \u003cli\u003eIncludes high-quality piston rings, wrist pin(s), and circlips\u003c\/li\u003e\n  \u003cli\u003eEngineered, forged, and machined in the USA in Mentor, OH\u003c\/li\u003e\n  \u003cli\u003e100.50 mm Bore, 9.9:1 CR\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe Wiseco 4966M10050 forged 4-stroke piston kit is designed for specific Yamaha powersports engine applications. It features a 100.50 mm bore and a 9.9:1 compression ratio, with forged construction engineered to provide strength and service life for performance and reliability.\u003c\/p\u003e\u003cp\u003eThis piston kit fits the 2001–2005 Yamaha YFM660R Raptor, 2002–2005 Yamaha YFM660F Grizzly 4x4, and 2004 Yamaha YXR66F Rhino 660. The dedicated forging is designed to optimize the strength-to-weight ratio for the application.\u003c\/p\u003e\u003cp\u003eThe kit includes high-quality piston rings, wrist pin(s), and circlips. The piston is engineered, forged, and machined in the USA in Mentor, Ohio. Manufacturer part number: 4966M10050. Vendor part number: 4966M10050.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBrand: Wiseco\u003c\/li\u003e\n\u003cli\u003eModel: Yamaha YFM660 Raptor\/Grizzly\/Rhino 9.91 CR Piston Kit\u003c\/li\u003e\n\u003cli\u003eSize: 100.50 mm bore\u003c\/li\u003e\n\u003cli\u003eCompression ratio: 9.9:1\u003c\/li\u003e\n\u003cli\u003eConstruction: Forged 4-stroke piston material designed for improved tensile strength and service life\u003c\/li\u003e\n\u003cli\u003eApplication: Designed and built for the specific Yamaha powersports engine application\u003c\/li\u003e\n\u003cli\u003eStrength-to-weight ratio: Dedicated forging optimized for the application\u003c\/li\u003e\n\u003cli\u003eIncluded components: High-quality piston rings, wrist pin(s), and circlips\u003c\/li\u003e\n\u003cli\u003eManufacturing: Engineered, forged, and machined in the USA in Mentor, Ohio\u003c\/li\u003e\n\u003cli\u003eFitment: 2001–2005 Yamaha YFM660R Raptor; 2002–2005 Yamaha YFM660F Grizzly 4x4; 2004 Yamaha YXR66F Rhino 660\u003c\/li\u003e\n\u003cli\u003eManufacturer part number: 4966M10050\u003c\/li\u003e\n\u003cli\u003eVendor part number: 4966M10050\u003c\/li\u003e\n\u003c\/ul\u003e\u003cbr\u003e\n\u003cbr\u003e\n\u003cbr\u003e\nAir Freight Prohibited: false\u003cbr\u003e\nNot Carb Approved: true\u003cbr\u003e\nCarb Acknowledgement Required: true\u003cbr\u003e\nLtl Freight Required: false\u003cbr\u003e\nProp 65: Y\u003cbr\u003e\nPart Type: powersports\u003cbr\u003e\nEpa: N\/A\u003cbr\u003e\nClearance Item: t\u003cbr\u003e\nRegular Stock: false\u003cbr\u003e\nUnits Per Sku: 1\u003cbr\u003e\nFitment:\u003cbr\u003e\n2001 Yamaha YFM660R Raptor Base\u003cbr\u003e\n2002 Yamaha YFM660F Grizzly 4x4 Base\u003cbr\u003e\n2002 Yamaha YFM660R Raptor Base\u003cbr\u003e\n2003 Yamaha YFM660F Grizzly 4x4 Base\u003cbr\u003e\n2003 Yamaha YFM660R Raptor Base\u003cbr\u003e\n2004 Yamaha YFM660F Grizzly 4x4 Base\u003cbr\u003e\n2004 Yamaha YFM660R Raptor Base\u003cbr\u003e\n2004 Yamaha YXR66F Rhino 660 Base\u003cbr\u003e\n2005 Yamaha YFM660F Grizzly 4x4 Base\u003cbr\u003e\n2005 Yamaha YFM660R Raptor Base\u003cbr\u003e\n2005 Yamaha YXR66F Rhino 660 Base\u003cbr\u003e\n2006 Yamaha YFM660F Grizzly 4x4 Base\u003cbr\u003e\n2006 Yamaha YXR66F Rhino 660 Base\u003cbr\u003e\n2006 Yamaha YXR66F Rhino 660 Exploring Edition Base\u003cbr\u003e\n2006 Yamaha YXR66F Rhino 660 Special Edition Base\u003cbr\u003e\n2007 Yamaha YFM660F Grizzly 4x4 Base\u003cbr\u003e\n2007 Yamaha YXR66F Rhino 660 Base\u003cbr\u003e\n2007 Yamaha YXR66F Rhino 660 Ducks Unlimited Base\u003cbr\u003e\n2007 Yamaha YXR66F Rhino 660 Exploring Edition Base\u003cbr\u003e\n2007 Yamaha YXR66F Rhino 660 Special Edition Base\u003cbr\u003e\n2007 Yamaha YXR66F Rhino 660 Sport Edition Base\u003cbr\u003e\n2008 Yamaha YFM660F Grizzly 4x4 Base","brand":"Wiseco","offers":[{"title":"Default Title","offer_id":68300498370795,"sku":"655386","price":209.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/780d1180f8c7d133af3efeaebd247fa7_8904a09b-34ed-427f-bf8f-c573bda6e188.jpg?v=1793226859","url":"https:\/\/ctracingservices.com\/products\/wiseco-100-50-mm-yamaha-yfm660-piston-kit-4966m10050","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}