WSM Engine Rebuild Kit .50mm / .020” Oversized 81.50mm Bore Platinum Series Piston Kits and Complete Gasket Set With Crankshaft Oil Seals. Includes (3) Pistons, (3) Sets of Rings, (3) Pins, (3) Pairs of Clips, (3) Top End Bearings, and (1) Complete Gasket Set With Crankshaft Oil Seals.