{"product_id":"40254m09700-wiseco-std-piston-kit-for-yamaha-wr450f-2021-2023-97mm-13-1-cr","title":"40254M09700 Wiseco Std Piston Kit for Yamaha WR450F 2021-2023 97mm 13:1 CR","description":"\u003ch2\u003eStandard Piston Kit for Yamaha WR450F\u003c\/h2\u003e\u003cp\u003eThis Wiseco standard piston kit for Yamaha WR450F delivers 97mm bore diameter with a 13:1 high compression ratio, featuring the OEM cross-reference 40254M09700 for direct fitment on 2021-2023 models.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis standard piston kit for Yamaha WR450F is a high-compression forged piston assembly engineered for 2021-2023 models. The 13:1 compression ratio piston kit for Yamaha WR450F restores top-end power and throttle response after a rebuild. Ideal for riders and mechanics performing routine top-end service or performance refresh on the WR450F.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e97mm standard bore diameter matches OEM cylinder specifications without overboring\u003c\/li\u003e\n\u003cli\u003e13:1 high compression ratio increases combustion pressure for stronger power output\u003c\/li\u003e\n\u003cli\u003eForged piston construction offers superior strength compared to cast alternatives\u003c\/li\u003e\n\u003cli\u003eWiseco part number 40254M09700 and OEM cross-reference ensure correct fitment\u003c\/li\u003e\n\u003cli\u003eComplete kit includes piston, rings, wrist pin, and circlips for a full top-end rebuild\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for 2021-2023 Yamaha WR450F engine architecture\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Yamaha WR450F 2021\u003c\/li\u003e\n\u003cli\u003efor Yamaha WR450F 2022\u003c\/li\u003e\n\u003cli\u003efor Yamaha WR450F 2023\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTop-end rebuilds after piston wear or ring fatigue\u003c\/li\u003e\n\u003cli\u003eMotocross and enduro racing engine refreshes\u003c\/li\u003e\n\u003cli\u003eTrail riding maintenance on high-hour engines\u003c\/li\u003e\n\u003cli\u003ePerformance rebuilds seeking higher compression\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\u003e40254M09700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e97mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompression Ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e13:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePiston Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard Bore, Forged\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Years\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2021-2023\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 kit include rings and wrist pin? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, this Wiseco piston kit ships as a complete assembly with piston, rings, wrist pin, and circlips for a full top-end install. Confirm your cylinder bore is within spec before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Do I need to reflash the ECU for the higher compression? \u003cstrong\u003eA:\u003c\/strong\u003e A 13:1 ratio may require premium fuel and, in some cases, ECU tuning to avoid detonation. Consult your tuner for your specific build.\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":51140007067734,"sku":"OO1C22414","price":527.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_b3fa9457-7653-40f8-8a55-e9073e1dacc8.jpg?v=1794565844","url":"https:\/\/www.solidspare.com\/products\/40254m09700-wiseco-std-piston-kit-for-yamaha-wr450f-2021-2023-97mm-13-1-cr","provider":"Solid Spare","version":"1.0","type":"link"}