... 415, 415H, 420, 420H, 428, 428H, 520, 520H, 530, 530H, 05MA, 05MB, 05MC, 06MC 2. O-Ring Motorcycle chains ... -ring chains and xw-chains: 420,428,520,525,530,630 (Racing Chains)7. Leaf chains: LH series8. ... 25NP,35NP,41NP,40NP,50NP10. Coupling chains The Chain technic treatment is as below:1.Shot peening2.Bluing3 ... .Carburizing8.Quenching9.Tempering10.Oiling11.Greasing motorcycle chain roller chain