{"product_id":"222m04750-020-piston-kit-for-yamaha-gt1-mx80-1973-1982-47-50-mm","title":"222M04750 .020 Piston Kit for Yamaha GT1 MX80 1973-1982 47.50 mm","description":"\u003ch2\u003eWiseco Piston Kit for Yamaha GT1 \u0026amp; MX80\u003c\/h2\u003e\u003cp\u003eThis Wiseco 222M04750 piston kit, sized at 47.50 mm with a .020 oversize bore, is a forged replacement piston assembly for Yamaha GT1 and MX80 engines and brings compression and cylinder sealing back to spec.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis Wiseco piston kit for Yamaha GT1 and MX80 models, part 222M04750, delivers a forged piston and matching components sized at 47.50 mm for a .020 oversize bore. The piston kit suits riders and mechanics rebuilding worn top ends on 1973 to 1982 Yamaha GT1 and MX80 engines. Each piston kit follows Wiseco 222M series dimensions for a clean fit in a freshly honed 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\u003e47.50 mm diameter sized for a .020 oversize cylinder bore\u003c\/li\u003e\n\u003cli\u003eWiseco 222M04750 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 ring wear or light scoring\u003c\/li\u003e\n\u003cli\u003eOversize rebore service on a cylinder that needs a slight cleanup hone\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\u003e222M04750\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePiston Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e47.50 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.020\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 Will this piston fit a standard bore cylinder? \u003cstrong\u003eA:\u003c\/strong\u003e No, this piston is sized at 47.50 mm for a .020 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 What else should I replace during the rebuild? \u003cstrong\u003eA:\u003c\/strong\u003e Pair this Yamaha GT1 or MX80 piston kit with fresh gaskets, a wrist pin bearing, and a cylinder hone to spec so ring seal and compression come back properly.\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":51139863740502,"sku":"OO1C22209","price":274.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_0b1f432d-0d15-4a80-bd27-a131d857989a.jpg?v=1794565684","url":"https:\/\/www.solidspare.com\/products\/222m04750-020-piston-kit-for-yamaha-gt1-mx80-1973-1982-47-50-mm","provider":"Solid Spare","version":"1.0","type":"link"}