
39.9 mm Piston Ring Set - AIRSAL (manufacturer reference: 110841399)
Replacement piston ring set designed for pistons with a bore of 39.9 mm. This AIRSAL kit meets the maintenance needs of urban two-wheelers: ensuring the sealing of the combustion chamber, maintaining compression, and limiting oil leaks. Ideal for riders who maintain their mechanics and refurbish a small displacement engine.
Practical notes: always check the cylinder bore size before installation and follow the manufacturer's recommendations for the ring gap and installation of the rings. If in doubt, have the cylinder and piston (ovalization, scratches) checked by a qualified workshop. This ring set naturally integrates into an engine overhaul to restore proper compression and clean combustion on your urban rides.




