{"product_id":"40255m09700-wiseco-std-piston-for-yamaha-yz450f-fx-2020-2023-97mm-13-5-1","title":"40255M09700 Wiseco Std Piston for Yamaha YZ450F FX 2020-2023 97mm 13.5:1","description":"\u003ch2\u003eWiseco Std Piston for Yamaha YZ450F\/FX\u003c\/h2\u003e\u003cp\u003eThis Wiseco Standard Piston (OEM cross-reference 40255M09700) is a 97mm, 13.5:1 high compression piston for Yamaha YZ450F and YZ450FX models from 2020-2023, built to deliver strong top-end power for motocross and off-road use.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis Wiseco Std Piston for Yamaha YZ450F\/FX gives riders a high compression replacement piston for 2020-2023 machines, referencing 40255M09700. With a 97mm bore and 13.5:1 compression ratio, it supports sharp throttle response and reliable performance in the YZ450F and YZ450FX engine. It suits racers and mechanics performing top-end rebuilds or performance refreshes on compatible models.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e97mm standard bore piston sized for the YZ450F\/FX cylinder\u003c\/li\u003e\n\u003cli\u003e13.5:1 high compression ratio for strong combustion efficiency\u003c\/li\u003e\n\u003cli\u003eForged construction for durability under high RPM use\u003c\/li\u003e\n\u003cli\u003eOEM cross-reference 40255M09700 for easy verification\u003c\/li\u003e\n\u003cli\u003eStandard profile designed for direct-fit rebuilds\u003c\/li\u003e\n\u003cli\u003eBuilt for Yamaha YZ450F and YZ450FX 2020-2023 engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Yamaha YZ450F 2020\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ450F 2021\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ450F 2022\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ450F 2023\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ450FX 2020\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ450FX 2021\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ450FX 2022\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ450FX 2023\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTop-end rebuilds on YZ450F motocross bikes\u003c\/li\u003e\n\u003cli\u003eOff-road and trail riding on YZ450FX models\u003c\/li\u003e\n\u003cli\u003ePerformance refreshes after piston wear or ring fatigue\u003c\/li\u003e\n\u003cli\u003eRace prep and engine maintenance for compatible years\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\u003e40255M09700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Size\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\u003e13.5:1\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWiseco\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 Will this piston work in my YZ450F or YZ450FX? \u003cstrong\u003eA:\u003c\/strong\u003e It is designed for Yamaha YZ450F and YZ450FX models from 2020-2023 with a 97mm bore. Confirm your model year and engine specifications before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Does the higher compression ratio require fuel changes? \u003cstrong\u003eA:\u003c\/strong\u003e A 13.5:1 ratio may call for higher-octane fuel depending on your setup and tuning. Check your engine builder's recommendations before installation.\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":51139915579478,"sku":"OO1C22299","price":571.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_ad8b3301-dbb2-482f-ba6a-1eeb130205b3.jpg?v=1794565744","url":"https:\/\/www.solidspare.com\/products\/40255m09700-wiseco-std-piston-for-yamaha-yz450f-fx-2020-2023-97mm-13-5-1","provider":"Solid Spare","version":"1.0","type":"link"}