428H high quality motorcycle chain,suit for all kinds of motorcycles as Yamaha,suzuki material:40mn/45mn ... standard:ISO/ANSI/DIN 428H high quality motorcycle chain,suit for all kinds of motorcycles as Yamaha,suzuki1)material:40mn ... .5mm pitches),B series (9.525-50.8mm pitches)2)motorcycle chains :415,415H,420,420H,428,428H,520,520H,6303 ...