Piston ring set for Honda Dio scooters. The rings seal the piston in the cylinder: they maintain compression and scrape excess oil off the walls, keeping it out of the combustion chamber.
Consider replacing the rings if compression drops, starting is difficult, power is lost, oil consumption is high, or blue smoke comes from the muffler. Size std is the standard size, for a cylinder that has not been rebored. The size listed in the description is 39.00 mm.
- Before assembly, clean and inspect the mating surfaces.
- Lubricate the moving parts with engine oil and break in the engine at moderate rpm.
Manufacturer: KOSO.
