{"product_id":"40155m07700-piston-kit-for-yamaha-yz250f-2016-2018-wiseco-std-77-00-mm-14-1-cr","title":"40155M07700 Piston Kit for Yamaha YZ250F 2016-2018 Wiseco Std 77.00 mm 14:1 CR","description":"\u003ch2\u003eWiseco Std Piston Kit for Yamaha YZ250F\u003c\/h2\u003e\u003cp\u003eThis Wiseco standard bore piston kit, part 40155M07700, is a 77.00 mm piston with a 14:1 compression ratio for Yamaha YZ250F engines, restoring stock top-end performance.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis Wiseco standard piston kit for Yamaha YZ250F models from 2016 through 2018 uses a 77.00 mm piston with a 14:1 compression ratio to refresh top-end power. It suits riders and engine builders returning a YZ250F to stock bore dimensions. Each piston kit for Yamaha YZ250F applications is a direct-fit replacement for the original bore size.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e77.00 mm standard bore piston matching the original size\u003c\/li\u003e\n\u003cli\u003e14:1 compression ratio for strong midrange and top-end power\u003c\/li\u003e\n\u003cli\u003eWiseco part number 40155M07700 for easy verification\u003c\/li\u003e\n\u003cli\u003eForged piston construction for durability under race conditions\u003c\/li\u003e\n\u003cli\u003eRing, pin, and clip hardware included in the kit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Yamaha YZ250F 2016\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ250F 2017\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ250F 2018\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTop-end rebuilds at stock bore size\u003c\/li\u003e\n\u003cli\u003eMotocross and off-road racing on YZ250F machines\u003c\/li\u003e\n\u003cli\u003eRestoring lost compression on high-hour engines\u003c\/li\u003e\n\u003cli\u003eRoutine piston replacement during engine service\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\u003e40155M07700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePiston Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e77.00 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompression Ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e14:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003efor Wiseco\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMachine\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003efor Yamaha YZ250F\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 Is this a standard or oversize piston? \u003cstrong\u003eA:\u003c\/strong\u003e This is a standard bore piston at 77.00 mm, so it fits a stock-size cylinder that is within spec.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What should be checked before installing a new piston? \u003cstrong\u003eA:\u003c\/strong\u003e Measure the cylinder bore for wear and taper, check ring end gap, and inspect the wrist pin bearing and valve train while the top end is apart.\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":51140191387734,"sku":"OO1C22671","price":527.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_e5f68a4c-f1f4-451d-9abe-c7f390e2f1aa.jpg?v=1794566011","url":"https:\/\/www.solidspare.com\/products\/40155m07700-piston-kit-for-yamaha-yz250f-2016-2018-wiseco-std-77-00-mm-14-1-cr","provider":"Solid Spare","version":"1.0","type":"link"}