{"product_id":"521m05800-wiseco-piston-kit-080-for-yamaha-yz125-1985-58-00-mm","title":"521M05800 Wiseco Piston Kit .080 for Yamaha YZ125 1985 58.00 mm","description":"\u003ch2\u003eWiseco .080 Piston Kit for Yamaha YZ125\u003c\/h2\u003e\u003cp\u003eThis Wiseco .080 overbore piston kit for Yamaha YZ125 brings your top end back to spec with a 58.00 mm bore size, carrying OEM-style cross-reference 521M05800 for straightforward matching.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis Wiseco .080 piston kit for Yamaha YZ125 is a complete top-end rebuild solution for a worn or scored cylinder that has been bored to 58.00 mm. The kit cross-references 521M05800 and delivers the piston, rings, pin, and clips needed to restore compression. It suits riders and mechanics rebuilding 1985 YZ125 engines who want a proven overbore piston rather than a stock replacement.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eWiseco forged piston construction for strength under high rpm\u003c\/li\u003e\n\u003cli\u003e.080 overbore size of 58.00 mm to clean up a damaged cylinder bore\u003c\/li\u003e\n\u003cli\u003eCross-reference 521M05800 for accurate part matching\u003c\/li\u003e\n\u003cli\u003eKit includes piston, rings, wrist pin, and circlips\u003c\/li\u003e\n\u003cli\u003eDesigned for two-stroke top-end rebuilds on the 1985 YZ125\u003c\/li\u003e\n\u003cli\u003eMachined ring grooves for consistent ring seal and compression\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\u003cli\u003efor Yamaha YZ125 1985\u003c\/li\u003e\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTop-end rebuild after cylinder wear or piston seizure\u003c\/li\u003e\n\u003cli\u003eOverbore refresh when the stock bore is out of tolerance\u003c\/li\u003e\n\u003cli\u003eMotocross and trail riding maintenance on the YZ125\u003c\/li\u003e\n\u003cli\u003eShop or home garage engine repair\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\u003e521M05800\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e58.00 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverbore\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.080\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\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMachine\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYamaha YZ125\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eYear\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1985\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 this kit fit a stock, unbored cylinder? \u003cstrong\u003eA:\u003c\/strong\u003e No, this is a .080 overbore piston sized at 58.00 mm and requires the cylinder to be bored and honed to match before installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e What is included with this piston kit? \u003cstrong\u003eA:\u003c\/strong\u003e It ships as a top-end kit with the piston, rings, wrist pin, and circlips so you have the core parts for the rebuild in one package.\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":51140081418326,"sku":"OO1C22526","price":376.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_0b07cc73-8250-43ad-ada2-c8b20e3014cb.jpg?v=1794565914","url":"https:\/\/www.solidspare.com\/products\/521m05800-wiseco-piston-kit-080-for-yamaha-yz125-1985-58-00-mm","provider":"Solid Spare","version":"1.0","type":"link"}