{"product_id":"546m08700-wiseco-std-piston-kit-for-yamaha-yz490-1984-1990-87-00-mm","title":"546M08700 Wiseco Std Piston Kit for Yamaha YZ490 1984-1990 87.00 mm","description":"\u003ch2\u003eWiseco Std Piston Kit for Yamaha YZ490\u003c\/h2\u003e\u003cp\u003eThis Wiseco Std piston kit for Yamaha YZ490 maintains the factory 87.00 mm bore size and carries OEM cross-reference 546M08700 for standard-bore top end service.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis Wiseco Std piston kit for Yamaha YZ490 restores stock bore dimensions with an 87.00 mm piston. It is intended for 1984-1990 YZ490 engines that have not been overbored. Riders replacing a worn piston while keeping the original cylinder size will find this kit a straightforward fit.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e87.00 mm standard bore size\u003c\/li\u003e\n\u003cli\u003eForged aluminum construction for durability under heat\u003c\/li\u003e\n\u003cli\u003ePrecision-machined ring grooves and skirt\u003c\/li\u003e\n\u003cli\u003eOEM cross-reference 546M08700 for fitment matching\u003c\/li\u003e\n\u003cli\u003eComplete kit with 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 YZ490 1984\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ490 1985\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ490 1986\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ490 1987\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ490 1988\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ490 1989\u003c\/li\u003e\n\u003cli\u003efor Yamaha YZ490 1990\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eStandard-bore top end rebuilds on YZ490 engines\u003c\/li\u003e\n\u003cli\u003eRefreshing compression without boring the cylinder\u003c\/li\u003e\n\u003cli\u003eMotocross and off-road riding on high-hour machines\u003c\/li\u003e\n\u003cli\u003eRoutine piston replacement during engine 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\u003e546M08700\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e87.00 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverbore\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eStandard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMachine Fitment\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003efor Yamaha YZ490\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel Years\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1984-1990\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 Can I use this piston without boring my cylinder? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, this Std piston matches the original 87.00 mm bore, so no overbore is needed if the cylinder is within spec.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What is included in this piston kit? \u003cstrong\u003eA:\u003c\/strong\u003e The kit includes the piston, rings, wrist pin, and circlips needed for a top end rebuild.\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":51139955556438,"sku":"OO1C22351","price":483.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_4bb959ec-6076-497e-a33f-d5881eeb1587.jpg?v=1794565769","url":"https:\/\/www.solidspare.com\/products\/546m08700-wiseco-std-piston-kit-for-yamaha-yz490-1984-1990-87-00-mm","provider":"Solid Spare","version":"1.0","type":"link"}