{"product_id":"457m04950-wiseco-020-piston-kit-49-50-mm-for-yamaha-yz80-1976-1980","title":"457M04950 Wiseco .020 Piston Kit 49.50 mm for Yamaha YZ80 1976-1980","description":"\u003ch2\u003eWiseco .020 Piston Kit for Yamaha YZ80\u003c\/h2\u003e\u003cp\u003eThis Wiseco .020 oversize piston kit for Yamaha YZ80 is an engine rebuild component that restores compression and top end performance, cross-referenced to 457M04950 and bored to 49.50 mm.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis Wiseco .020 piston kit for Yamaha YZ80 delivers a 49.50 mm oversize bore for worn cylinders that need a fresh top end. The kit is built for riders and mechanics rebuilding 1976 through 1980 YZ80 engines who want reliable compression and consistent performance.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e.020 oversize bore at 49.50 mm to clean up worn cylinder walls\u003c\/li\u003e\n\u003cli\u003eWiseco forged piston construction for strength under high rpm use\u003c\/li\u003e\n\u003cli\u003eCross-reference 457M04950 matches the original application\u003c\/li\u003e\n\u003cli\u003eDesigned for 1976 through 1980 Yamaha YZ80 engines\u003c\/li\u003e\n\u003cli\u003eKit format supports a complete top end rebuild in one purchase\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Yamaha YZ80 1976\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ80 1977\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ80 1978\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ80 1979\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ80 1980\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTop end rebuilds after piston scoring or seizure\u003c\/li\u003e\n\u003cli\u003eCylinder boring to the next oversize when walls are worn\u003c\/li\u003e\n\u003cli\u003eRestoring compression on older YZ80 minicross bikes\u003c\/li\u003e\n\u003cli\u003eRace prep and routine engine refresh work\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\u003e457M04950\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e49.50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOversize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.020\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePiston Kit\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 kit require boring the cylinder? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, a .020 oversize piston needs the cylinder bored and honed to match the 49.50 mm size before installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is this an original Yamaha part? \u003cstrong\u003eA:\u003c\/strong\u003e No, this is an aftermarket Wiseco piston kit cross-referenced to 457M04950 for Yamaha YZ80 applications.\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":51140022403158,"sku":"OO1C22448","price":268.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_d2f978c5-060f-4533-b733-cccdf606f6b7.jpg?v=1794565858","url":"https:\/\/www.solidspare.com\/products\/457m04950-wiseco-020-piston-kit-49-50-mm-for-yamaha-yz80-1976-1980","provider":"Solid Spare","version":"1.0","type":"link"}