... 25000~30000kms, which is strict quality test result. 1.Motorcycle Roller Chains:25H (04CH), 415, 415H, 420, 420H, 428, 428H, 520 ... ,630 (Racing Chains)7. Leaf chains: LH series8. Double pitch conveyor chains with attachments: 2040,2050,2060,20809. Nickel-plated chains ... . Coupling chains Model428 428H 420 520 520h 530 etc ItemMotorcycle Roller chain Motorcycle drive chain GearFront 13T 14T 15T 16T 17T ...