Set of 57.00 mm piston rings for 125–150 cc 4-stroke scooters. The rings seal the piston in the cylinder: they hold compression and keep oil out of the combustion chamber. Country of origin: China. The product name states: "original".
Replace the rings if compression has dropped, the engine starts poorly, oil consumption has increased, or bluish smoke comes from the muffler. They are chosen according to the piston diameter. Before installation, check the cylinder wall and the ring end gap, and fit the rings with the gaps facing opposite directions.
