Wiseco 546M08700 Piston Kit for Yamaha WR500 / YZ490 - 87.00mm

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Wiseco Standard Replacement Piston KitPart Number: 546M08700 These kits contain everything you need to complete your piston repair, the first time High Performance ring kit and all oy pin included with each piston kit for extended life and sustained power. Dedicated forgings used for superior strength to weight ratio utilizing aerospace alloy. All Piston Kits are precision crafted and forged in the USA Wiseco's Piston Kits are offered for nearly every popular application in the powersports market. These kits contain everything you need to complete your piston repair, the first time. High quality parts specifically chosen by us to match our forged pistons are included in this kit for easy one stop shopping. 2-stroke kits feature our Pro-Lite pistons that are CNC machined for optimal cam shape and profile for peak HP and service life. 4-stroke kits feature a race-ready dome finish with smooth edges for improved combustion flow. Horizontal slot-pin oiling reduces friction and provides scuff resistance, along with a pressure seal groove for maximum ring seal. 4-stroke race applications feature Wiseco's Armor Glide skirt coating to provide reduced friction and noise to contribute to increased horsepower. Each piston is built from race proven designs that are chosen by the top race teams in all forms of racing including Supercross, Motocross, GNCC, Super-bike, and more. Fits:1992-93 Yamaha WR5001984-90 Yamaha YZ490 Specs: Displacement: 487cc Bore-Standard: 87.00mm Bore-Actual: 87.00mm Bore-Oversize: STD Stroke: 82.00mm Items Included Fitments 1993 Yamaha WR500 1992 Yamaha WR500 1990 Yamaha YZ490 1989 Yamaha YZ490 1988 Yamaha YZ490 1987 Yamaha YZ490 1986 Yamaha YZ490 1985 Yamaha YZ490 1984 Yamaha YZ490 Show more