... one-stop service All parts of 520 roller chains are by special surface treatment On ... 30000kms, which is strict quality test result. 1.Motorcycle Roller Chains:25H (04CH), 415, 415H, 420, 420H, ... -Ring Motorcycle chains: 428SO,520SO,525SO,530SO3. Roller chains: A series and B series4. Silent chains: SC3, ... 428H 420 520 520h 530 etc ItemMotorcycle Roller chain Motorcycle drive chain GearFront 13T 14T 15T ...