All Wiseco Rings Can Be Used in Cast Iron, Nickel Ceramic Platings (Nikasil), Boron Composite, and Electrofusion Bores. CAUTION: Unless Otherwise Noted, Wiseco Rings Can NOT Be Used in Chrome Plated Bores. Engine Damage Will Occur.Only to Be Used With Wiseco PistonsSet Is for One Piston OnlyAmount and Type of Rings Included Is Dependent on Your Specific Application, and May Not Match What Is Shown in the Image. Do Not Purchase Based on Image AloneThickness (In Mm): 1Bore Size (In Mm): 40.5Includes 2 RingsOnly Fits Models Listed With One of the Following Wiseco Pistons Installed (P/N Located on Piston):653M04050, 727M04050Yamaha Fitment:YSR50 1987-1992PW50 1985-1987, 1990-2009Includes a Total of 2 Piston Rings

Powersport > ENGINE > Piston Rings Clips & Bearings > Replacement Ring Set|Application: YAM PPW50 ALL YEARS|Wiseco Piston Replacement Ring Set 1594CD, Pair.

PROP 65 WARNING: Cancer and/or reproductive harm - www.P65Warnings.ca.gov