... , 428H, 520, 520H, 530, 530H, 05MA, 05MB, 05MC, 06MC 2. O-Ring Motorcycle chains: 428SO,520SO,525SO,530SO3. Roller chains: A series and ... ,SC8,SC105. PIV chains: A0,A1,A3,A4,A5,A66. O-ring chains and xw-chains: 420,428,520,525,530,630 ... -plated chains: 25NP,35NP,41NP,40NP,50NP10. Coupling chains The Chain technic treatment is as below:1.Shot peening2.Bluing3.Phosphating4 ...