{"product_id":"4906m09800-wiseco-3mm-piston-kit-for-yamaha-yfz450-yfz450r-2004-2024-98mm-12-5","title":"4906M09800 Wiseco +3mm Piston Kit for Yamaha YFZ450 YFZ450R 2004-2024 98mm 12.5:","description":"\u003ch2\u003eWiseco +3mm Piston Kit for Yamaha YFZ450\/YFZ450R\u003c\/h2\u003e\u003cp\u003eThis Wiseco +3mm piston kit for Yamaha YFZ450 and YFZ450R models is a 98mm forged piston assembly rated at 12.5:1 compression, carrying the Wiseco reference 4906M09800 for a big bore rebuild.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis Wiseco +3mm piston kit for Yamaha YFZ450 and YFZ450R quads delivers a 98mm forged piston with a 12.5:1 compression ratio for riders rebuilding a worn or tired top end. The kit is built for owners of 2004 through 2024 YFZ450 and YFZ450R models who want a stronger, higher compression piston kit for their machine. Each Wiseco piston kit is made to the 4906M09800 spec so your big bore build stays matched to the correct bore and ratio.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e98mm bore size with a +3mm oversize over stock for increased displacement\u003c\/li\u003e\n\u003cli\u003e12.5:1 compression ratio suited to high performance four stroke quads\u003c\/li\u003e\n\u003cli\u003eForged piston construction for strength under high rpm and heat\u003c\/li\u003e\n\u003cli\u003eWiseco reference 4906M09800 identifies the exact piston kit\u003c\/li\u003e\n\u003cli\u003ePiston kit sized for Yamaha YFZ450 and YFZ450R top end rebuilds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Yamaha YFZ450\u003c\/li\u003e\n\u003cli\u003efor Yamaha YFZ450R\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 loss of compression\u003c\/li\u003e\n\u003cli\u003eBig bore builds for more displacement and stronger power delivery\u003c\/li\u003e\n\u003cli\u003eMX and trail riding on YFZ450 and YFZ450R quads\u003c\/li\u003e\n\u003cli\u003eRefreshing a high hour engine during a full teardown\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\u003e4906M09800\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e98mm (+3mm oversize)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompression Ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12.5:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePiston Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eForged\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003efor Yamaha YFZ450 \/ YFZ450R\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 a +3mm piston require boring the cylinder? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, a 98mm piston needs the cylinder bored and honed to match, so check your current bore before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is this a complete top end kit? \u003cstrong\u003eA:\u003c\/strong\u003e It is a piston kit, so verify the listing contents for rings, pin, and clips, and confirm compression ratio suits your build and fuel.\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":51139970695254,"sku":"OO1C22374","price":615.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_9361daa7-a1bf-4dca-ac6a-5dfe4345c39e.jpg?v=1794565839","url":"https:\/\/www.solidspare.com\/products\/4906m09800-wiseco-3mm-piston-kit-for-yamaha-yfz450-yfz450r-2004-2024-98mm-12-5","provider":"Solid Spare","version":"1.0","type":"link"}