... 3.plate thickness:2.42mm Best quality 530H A3 motorcycle chain 1.material:40MN/A32.pitch:15. ... 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,525SO,530SO3. ... 35NP,41NP,40NP,50NP10. Coupling chains The Chain technic treatment is as below:1.Shot peening2 ...