{"product_id":"4675m07150-wiseco-piston-kit-for-yamaha-timberwolf-250-1990-2000-020-71-50","title":"4675M07150 Wiseco Piston Kit for Yamaha Timberwolf 250 1990-2000 .020 71.50","description":"\u003ch2\u003eWiseco .020 Piston Kit for Yamaha Timberwolf 250\u003c\/h2\u003e\u003cp\u003eThis .020 oversize piston kit for Yamaha Timberwolf 250 is a rebuild component that restores compression and bore fit to the 250cc single, referencing OEM cross-reference 4675M07150 with a 71.50mm bore and 8.7:1 compression ratio.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis Wiseco .020 piston kit serves riders rebuilding a worn or scored Yamaha Timberwolf 250 top end. The 71.50mm oversize bore and 8.7:1 compression ratio restore factory-style compression for the 1990-2000 model run. It suits DIY mechanics and shops handling a complete top-end refresh on this machine.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e.020 oversize 71.50mm bore piston for use after cylinder boring\u003c\/li\u003e\n\u003cli\u003e8.7:1 compression ratio matched to the 250cc Timberwolf powerplant\u003c\/li\u003e\n\u003cli\u003eForged piston construction for strength under heat and load\u003c\/li\u003e\n\u003cli\u003eKit includes piston, rings, wrist pin, and circlips for a complete install\u003c\/li\u003e\n\u003cli\u003eCross-references OEM number 4675M07150 for easy lookup\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\u003cli\u003efor Yamaha Timberwolf 250, 1990-2000\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTop-end rebuild after cylinder scoring or piston wear\u003c\/li\u003e\n\u003cli\u003eRestoring compression on high-hours utility quads\u003c\/li\u003e\n\u003cli\u003eShop or home garage engine refresh\u003c\/li\u003e\n\u003cli\u003eBore-out rebuild matched to a .020 over cylinder\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecs At A Glance\u003c\/h4\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number(s)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4675M07150\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e71.50mm (.020 over)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompression Ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8.7:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eKit Contents\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePiston, rings, wrist pin, circlips\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch4\u003eGood To Know\u003c\/h4\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Does this piston drop into a stock cylinder? \u003cstrong\u003eA:\u003c\/strong\u003e No, a .020 oversize piston requires the cylinder to be bored and honed to match the 71.50mm size before assembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Can I install this without checking ring end gap? \u003cstrong\u003eA:\u003c\/strong\u003e Ring end gap should always be measured and adjusted to spec during assembly to avoid poor sealing or seizure.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSlight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.\u003c\/em\u003e\u003c\/p\u003e","brand":"Solid Spare","offers":[{"title":"Default Title","offer_id":51139979870294,"sku":"OO1C22392","price":439.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_66c1dc07-1a72-4457-b05e-842b859eb796.jpg?v=1794490628","url":"https:\/\/www.solidspare.com\/products\/4675m07150-wiseco-piston-kit-for-yamaha-timberwolf-250-1990-2000-020-71-50","provider":"Solid Spare","version":"1.0","type":"link"}