{"product_id":"222m04850-060-piston-kit-for-yamaha-gt1-mx80-1973-1982-48-50-mm","title":"222M04850 .060 Piston Kit for Yamaha GT1 MX80 1973-1982 48.50 mm","description":"\u003ch2\u003eWiseco Piston Kit for Yamaha GT1 \u0026amp; MX80\u003c\/h2\u003e\u003cp\u003eThis Wiseco 222M04850 piston kit, sized at 48.50 mm with a .060 oversize bore, is a forged replacement piston assembly for Yamaha GT1 and MX80 engines and restores compression and cylinder sealing on worn top ends.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis Wiseco piston kit for Yamaha GT1 and MX80 models, part 222M04850, gives you a forged piston and matching components sized at 48.50 mm for a .060 oversize bore. The piston kit is built for riders and mechanics rebuilding worn or scored top ends on 1973 to 1982 Yamaha GT1 and MX80 machines. Each piston kit is produced to Wiseco 222M series dimensions so it drops into a freshly bored cylinder.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eForged aluminum piston construction for strength under combustion heat and load\u003c\/li\u003e\n\u003cli\u003e48.50 mm diameter sized for a .060 oversize cylinder bore\u003c\/li\u003e\n\u003cli\u003eWiseco 222M04850 part number identifies the exact piston and ring configuration\u003c\/li\u003e\n\u003cli\u003eDesigned for the Yamaha GT1 and MX80 1973 to 1982 engine family\u003c\/li\u003e\n\u003cli\u003eKit format includes the piston and matching components for a top-end rebuild\u003c\/li\u003e\n\u003cli\u003eOversize bore sizing restores cylinder wall clearance after honing or reboring\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Yamaha GT1\u003c\/li\u003e\n\u003cli\u003efor Yamaha MX80\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTop-end rebuilds on worn or scored Yamaha GT1 and MX80 cylinders\u003c\/li\u003e\n\u003cli\u003eRestoring compression after a seize or ring failure\u003c\/li\u003e\n\u003cli\u003eOversize rebore service on a cylinder that has already been honed past spec\u003c\/li\u003e\n\u003cli\u003eVintage two-stroke engine refresh on 1973 to 1982 Yamaha machines\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\u003e222M04850\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePiston Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e48.50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOversize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.060\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Models\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYamaha GT1, MX80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel Years\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1973-1982\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 Do I need to bore my cylinder to use this piston? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, this piston is sized at 48.50 mm for a .060 oversize bore, so the cylinder must be bored or honed to match that clearance before assembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Can I install this myself? \u003cstrong\u003eA:\u003c\/strong\u003e A top-end rebuild requires precise cylinder measurement, ring gap checking, and correct torque specs, so it is best handled by a machinist or experienced mechanic for the Yamaha GT1 or MX80.\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":51139863150678,"sku":"OO1C22208","price":285.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_6323ef4c-29e4-43f6-9f6a-1788544cdd2e.jpg?v=1794565707","url":"https:\/\/www.solidspare.com\/products\/222m04850-060-piston-kit-for-yamaha-gt1-mx80-1973-1982-48-50-mm","provider":"Solid Spare","version":"1.0","type":"link"}