A set of piston rings for Active mopeds. Piston rings seal the piston in the cylinder: they hold compression and keep oil out of the combustion chamber. The rings match the piston size.
Replace them if compression drops, hot starting is poor, oil consumption increases, or there is bluish smoke from the muffler. Choose the size by the piston diameter.
Size 0.50 is an oversize. Manufacturer: KOSO. Manufacturer: KOSO.
