{"product_id":"4292m06750-wiseco-020-piston-for-yamaha-yfm-200-moto-4-87-88-67-50mm-10-25-1","title":"4292M06750 Wiseco .020 Piston for Yamaha YFM 200 Moto-4 87-88 67.50mm 10.25:1","description":"\u003ch2\u003e.020 Piston for Yamaha\u003c\/h2\u003e\u003cp\u003eThis Wiseco .020 overbore piston is for the Yamaha YFM 200 Moto-4 and restores compression in a worn top end, with the 67.50mm bore matching OEM cross-reference 4292M06750.\u003c\/p\u003e\u003ch4\u003eOverview\u003c\/h4\u003e\u003cp\u003eThis Wiseco piston is a .020 overbore replacement for the Yamaha YFM 200 Moto-4, sized at 67.50mm with a 10.25:1 compression ratio. It replaces a worn or scored piston to bring compression and power back to the top end. The piston is built for riders and mechanics rebuilding 1987 to 1988 YFM 200 Moto-4 engines.\u003c\/p\u003e\u003ch4\u003eBuilt For Performance\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e67.50mm bore size, .020 inch overbore over the standard piston\u003c\/li\u003e\n\u003cli\u003e10.25:1 compression ratio for strong throttle response\u003c\/li\u003e\n\u003cli\u003eCross-references OEM part 4292M06750\u003c\/li\u003e\n\u003cli\u003eForged construction for strength under load\u003c\/li\u003e\n\u003cli\u003eMachined ring grooves for consistent ring seal\u003c\/li\u003e\n\u003cli\u003eSized for a cylinder bored to the matching oversize\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFits These Machines\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003efor Yamaha YFM 200 Moto-4 1987\u003c\/li\u003e\n\u003cli\u003efor Yamaha YFM 200 Moto-4 1988\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eOn-The-Job Use\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eTop end rebuilds on worn YFM 200 Moto-4 engines\u003c\/li\u003e\n\u003cli\u003eCylinder boring to the .020 oversize\u003c\/li\u003e\n\u003cli\u003eRestoring compression on high hour quads\u003c\/li\u003e\n\u003cli\u003eTrail and utility riding where torque matters\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\u003e4292M06750\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBore Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e67.50mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOverbore\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e.020\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompression Ratio\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10.25:1\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 YFM 200 Moto-4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel Years\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1987-1988\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 piston need a bored cylinder? \u003cstrong\u003eA:\u003c\/strong\u003e Yes, a .020 overbore piston requires the cylinder bored and honed to the matching 67.50mm size before assembly.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Should I replace the rings and pin at the same time? \u003cstrong\u003eA:\u003c\/strong\u003e Replacing the rings, pin, and clips along with the piston is standard practice during 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":51140002611286,"sku":"OO1C22408","price":373.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0697\/8460\/0662\/files\/s-l1600_094ed6f5-5623-4603-9c70-109dbeb3410a.jpg?v=1794565835","url":"https:\/\/www.solidspare.com\/products\/4292m06750-wiseco-020-piston-for-yamaha-yfm-200-moto-4-87-88-67-50mm-10-25-1","provider":"Solid Spare","version":"1.0","type":"link"}