Piston rings for Honda ZX scooters. They seal the gap between the piston and the cylinder, transfer heat from the piston to the cylinder walls, and limit the amount of oil that gets into the combustion chamber.
Signs of worn rings: the engine lacks power, starts worse when hot, and uses more oil than usual. Size std is the standard size, for a cylinder that has not been rebored. The size listed in the description is 40.00 mm.
- Install new gaskets and seals.
Manufacturer: KOSO.
