{"product_id":"4881m07700-wiseco-std-piston-kit-for-yamaha-yz250f-2005-2007-77-00mm-13-5-1","title":"4881M07700 Wiseco Std Piston Kit for Yamaha YZ250F 2005-2007 77.00mm 13.5:1","description":"\u003ch2\u003eWiseco Std Piston Kit for Yamaha YZ250F\u003c\/h2\u003e\u003cp\u003eThis Wiseco standard piston kit for Yamaha YZ250F fits 2005-2007 models with a 77.00mm bore and a higher 13.5:1 compression ratio, cross-referenced to 4881M07700.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis Wiseco Std Piston Kit for Yamaha YZ250F is a top-end replacement aimed at riders wanting sharper throttle response from a stock bore. It runs a 77.00mm piston at 13.5:1 compression and carries OEM cross-reference 4881M07700. It suits YZ250F owners rebuilding the engine for race or practice use.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e77.00mm standard bore keeps the stock cylinder in service\u003c\/li\u003e\n\u003cli\u003e13.5:1 compression ratio for stronger combustion and quicker revs\u003c\/li\u003e\n\u003cli\u003eForged piston body built for high-rpm four-stroke stress\u003c\/li\u003e\n\u003cli\u003eOEM cross-reference 4881M07700 for accurate parts matching\u003c\/li\u003e\n\u003cli\u003eComplete kit layout covering rings, pin, and clips for assembly\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Yamaha YZ250F 2005\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ250F 2006\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ250F 2007\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eRace builds needing higher compression within the stock bore\u003c\/li\u003e\n\u003cli\u003eTop-end rebuilds after compression loss or piston wear\u003c\/li\u003e\n\u003cli\u003eSeasonal motocross engine maintenance\u003c\/li\u003e\n\u003cli\u003eGarage and shop rebuild projects on YZ250F motors\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\u003e4881M07700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e77.00mm standard\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\u003eFitment Years\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2005-2007\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 Will a 13.5:1 piston need race fuel? \u003cstrong\u003eA:\u003c\/strong\u003e Higher compression ratios often call for premium or higher-octane fuel to avoid detonation. Check your fuel quality and jetting before riding.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is this piston a direct fit in the stock cylinder? \u003cstrong\u003eA:\u003c\/strong\u003e It is a 77.00mm standard bore piston intended for a stock cylinder in serviceable condition. Verify bore wear and clearance during assembly.\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":51139952902230,"sku":"OO1C22347","price":527.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_52a02927-d365-460a-b4a4-4b4310259fe8.jpg?v=1794565766","url":"https:\/\/www.solidspare.com\/products\/4881m07700-wiseco-std-piston-kit-for-yamaha-yz250f-2005-2007-77-00mm-13-5-1","provider":"Solid Spare","version":"1.0","type":"link"}