... 05MC, 06MC 2. O-Ring Motorcycle chains: 428SO,520SO,525SO,530SO3. Roller chains: A series and B series4. Silent chains: SC3 ... A0,A1,A3,A4,A5,A66. O-ring chains and xw-chains: 420,428,520,525,530,630 (Racing ... Chain technic treatment is as below:1.Shot peening2.Bluing3.Phosphating4.Nickel-plated5.Zincing6.Heat treatment7.Carburizing8.Quenching9.Tempering10.Oiling11.Greasing motorcycle chain roller chain ...