{"product_id":"4693m09500-wiseco-std-piston-kit-95mm-12-5-1-for-yamaha-yz426f-wr426f-2000-2002","title":"4693M09500 Wiseco Std Piston Kit 95mm 12.5:1 for Yamaha YZ426F WR426F 2000-2002","description":"\u003ch2\u003eWiseco Std Piston Kit for Yamaha YZ426F\/WR426F\u003c\/h2\u003e\u003cp\u003eThis Wiseco standard bore piston kit for Yamaha YZ426F and WR426F models delivers 95mm bore with 12.5:1 compression, cross-referencing part 4693M09500 for direct fitment.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis Wiseco standard piston kit is built for Yamaha YZ426F and WR426F owners who need a reliable top-end rebuild at stock bore size. The 95mm piston with 12.5:1 compression restores factory-spec performance. Each kit is engineered for riders who demand consistent power delivery from their 426cc four-stroke.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e95mm standard bore diameter matches original cylinder sizing\u003c\/li\u003e\n\u003cli\u003e12.5:1 compression ratio for strong mid-range and top-end power\u003c\/li\u003e\n\u003cli\u003eForged aluminum construction for durability under high-rpm use\u003c\/li\u003e\n\u003cli\u003eCross-references OEM part 4693M09500 for straightforward sourcing\u003c\/li\u003e\n\u003cli\u003eComplete kit includes piston, rings, pin, and clips\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Yamaha YZ426F 2000\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ426F 2001\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ426F 2002\u003c\/li\u003e\n\u003cli\u003efor Yamaha WR426F 2000\u003c\/li\u003e\n\u003cli\u003efor Yamaha WR426F 2001\u003c\/li\u003e\n\u003cli\u003efor Yamaha WR426F 2002\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTop-end rebuilds on YZ426F motocross bikes\u003c\/li\u003e\n\u003cli\u003eWR426F trail and enduro engine refreshes\u003c\/li\u003e\n\u003cli\u003eRestoring compression on high-hour engines\u003c\/li\u003e\n\u003cli\u003eRoutine piston replacement during valve 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\u003e4693M09500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e95mm (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\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\u003eKit Contents\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePiston, rings, pin, clips\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 bore or oversize piston? \u003cstrong\u003eA:\u003c\/strong\u003e This is a standard 95mm bore piston kit, so it fits a stock cylinder without boring.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What does the 12.5:1 compression ratio mean for my engine? \u003cstrong\u003eA:\u003c\/strong\u003e It matches the factory compression spec, so you get stock-level power without requiring fuel or head modifications.\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":51139963945046,"sku":"OO1C22362","price":505.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_fc85151f-425f-449c-9005-3c7022437291.jpg?v=1794565768","url":"https:\/\/www.solidspare.com\/products\/4693m09500-wiseco-std-piston-kit-95mm-12-5-1-for-yamaha-yz426f-wr426f-2000-2002","provider":"Solid Spare","version":"1.0","type":"link"}