92-00 YAMAHA RT100: Wiseco Replacement Piston Ring Set (Replacement Piston Ring Set - 52mm Bore - 2047CD) After nearly 70 years in the business, the name Wiseco has become synonymous with pistons, especially pistons for off-road racing and riding. Wiseco has attained that instant brand recognition by being one of the few manufacturers of forged pistons within the U.S.A. They carry a full line of performance products including forged pistons, precision forged clutch baskets and hubs, crankshafts, camshafts, forged connecting rods, valves, and other accessories for just about any motorcycle, ATV, snowmobile, PWC, outboard Image is for display only, actual item may vary by fitment.Detailed Specifications:Bore - actual: 52.00 mm.Compatible with Wiseco Piston P/N: 235M05200 / 455M05200 / 771M05200.