... Main products as the following: 1.Motorcycle Chains: 25H (04CH), 415, 415H, 420, 420H, 428, 428H, 520, 520H, 530, ... 530H, 05MA, 05MB, 05MC, 06MC 2. O-Ring Motorcycle chains: 428SO,520SO ... A66. O-ring chains and xw-chains: 420,428,520,525,530,630 (Racing Chains)7. Leaf ... 25NP,35NP,41NP,40NP,50NP10. Coupling chains The Chain technic treatment is as below:1.Shot peening2. ...