{"product_id":"wiseco-83-50-mm-4-stroke-forged-series-piston-kit-pk1778","title":"Wiseco 83.50 mm 4-Stroke Forged Series Piston Kit PK1778","description":"Premium materials produce the best sealing technology available exceeding O.E.M. standards.  2-Stroke: Wiseco top end gasket kit; Dedicated forging; Superior strength\/weight ratio utilizing Aerospace alloy; Race-proven designs; Chosen by top race teams, in all forms of racing; CNC machined; Optimal cam shape and profile for peak HP and service life; Premium top end needle bearing; Precision-machined, highest-quality materials for strength and reduced friction; High-performance ring set; Extended life and sustained power; Highest-quality alloy pin; Consistently true and durable.  4-Stroke: Wiseco top end gasket kit; Premium materials produce the best sealing technology available, exceeding O.E.M. standards; Dedicated forging; Superior strength\/weight ratio utilizing Aerospace alloy; Dome design; Improved flame travel; Chrome plated piston pin; Horizontal slot pin oiling; Reduced friction\/scuff resistant; Pressure seal groove; Maximum ring seal; Armor Glide Skirt-Coated available for select models; Dedicated Rings; Maximum compression and oil control.\nWiseco 4 Stroke Forged Series Piston Kit, 83.50 mm Bore, 8.6:1 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\u003c\/ul\u003e\n\u003cp\u003eThe Wiseco 4-Stroke Forged Series Piston Kit is designed for select Yamaha powersports applications. This kit features an 83.50 mm bore and an 8.6:1 compression ratio, with a dedicated forging engineered for the specific engine application. The forged material is designed to provide improved tensile strength, while the optimized strength-to-weight ratio supports service life and performance.\u003c\/p\u003e\u003cp\u003eThe piston kit includes high-quality piston rings, wrist pin(s), and circlips. Additional design features include a dome design for improved flame travel, a chrome-plated piston pin, horizontal slot pin oiling, a pressure seal groove for maximum ring seal, and dedicated rings for compression and oil control. The piston is engineered, forged, and machined in the USA in Mentor, Ohio.\u003c\/p\u003e\u003cp\u003eThis Wiseco piston kit fits 1993–1999 Yamaha YFM400F Kodiak 4x4 models, 2002 Yamaha YFM400 Big Bear 2x4 and 4x4 models, and 2003 Yamaha YFM400 Big Bear 2x4 models. Manufacturer part number: PK1778. Vendor part number: PK1778.\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: 4-Stroke Forged Series Piston Kit\u003c\/li\u003e\n\u003cli\u003eSize: 83.50 mm bore\u003c\/li\u003e\n\u003cli\u003eCompression Ratio: 8.6:1\u003c\/li\u003e\n\u003cli\u003eManufacturer Part Number: PK1778\u003c\/li\u003e\n\u003cli\u003eVendor Part Number: PK1778\u003c\/li\u003e\n\u003cli\u003eForged Construction: Dedicated forging with improved tensile strength and an optimized strength-to-weight ratio\u003c\/li\u003e\n\u003cli\u003eEngine Design: Designed and built for the specific 4-stroke powersports engine application\u003c\/li\u003e\n\u003cli\u003eIncluded Components: High-quality piston rings, wrist pin(s), and circlips\u003c\/li\u003e\n\u003cli\u003ePiston Design: Dome design for improved flame travel, chrome-plated piston pin, and horizontal slot pin oiling\u003c\/li\u003e\n\u003cli\u003eSealing: Pressure seal groove and dedicated rings for compression and oil control\u003c\/li\u003e\n\u003cli\u003eManufacturing: Engineered, forged, and machined in the USA in Mentor, Ohio\u003c\/li\u003e\n\u003cli\u003eFitment: 1993–1999 Yamaha YFM400F Kodiak 4x4, 2002 Yamaha YFM400 Big Bear 2x4 and 4x4, and 2003 Yamaha YFM400 Big Bear 2x4\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\n1993 Yamaha YFM400F Kodiak 4x4 Base\u003cbr\u003e\n1994 Yamaha YFM400F Kodiak 4x4 Base\u003cbr\u003e\n1995 Yamaha YFM400F Kodiak 4x4 Base\u003cbr\u003e\n1996 Yamaha YFM400F Kodiak 4x4 Base\u003cbr\u003e\n1997 Yamaha YFM400F Kodiak 4x4 Base\u003cbr\u003e\n1998 Yamaha YFM400F Kodiak 4x4 Base\u003cbr\u003e\n1999 Yamaha YFM400F Kodiak 4x4 Base\u003cbr\u003e\n2002 Yamaha YFM400 Big Bear 2x4 Base\u003cbr\u003e\n2002 Yamaha YFM400 Big Bear 4x4 Base\u003cbr\u003e\n2003 Yamaha YFM400 Big Bear 2x4 Base\u003cbr\u003e\n2003 Yamaha YFM400 Big Bear 4x4 Base\u003cbr\u003e\n2004 Yamaha YFM400 Big Bear 2x4 Base\u003cbr\u003e\n2004 Yamaha YFM400 Big Bear 4x4 Base\u003cbr\u003e\n2005 Yamaha YFM400 Big Bear 4x4 Base\u003cbr\u003e\n2006 Yamaha YFM400 Big Bear 4x4 Base\u003cbr\u003e\n2007 Yamaha YFM400 Big Bear IRS 4x4 Base\u003cbr\u003e\n2008 Yamaha YFM400 Big Bear IRS 4x4 Base\u003cbr\u003e\n2009 Yamaha YFM400 Big Bear IRS 4x4 Base\u003cbr\u003e\n2010 Yamaha YFM400 Big Bear IRS 4x4 Base\u003cbr\u003e\n2011 Yamaha YFM400 Big Bear IRS 4x4 Base\u003cbr\u003e\n2012 Yamaha YFM400 Big Bear IRS 4x4 Base","brand":"Wiseco","offers":[{"title":"Default Title","offer_id":68300485624043,"sku":"589552","price":252.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/3882\/9547\/files\/780d1180f8c7d133af3efeaebd247fa7_cf8eff0a-1919-4980-8c39-a5748c454859.jpg?v=1793226637","url":"https:\/\/ctracingservices.com\/products\/wiseco-83-50-mm-4-stroke-forged-series-piston-kit-pk1778","provider":"Cascade Tire \u0026 Racing Services","version":"1.0","type":"link"}