chongqing motorcycle parts 1,High friction coefficient 2,OEM manufacturer 3,Motorcycle brake manufacturer 4,ISO9001:2008 Model YJ70MaterialADC12/Y113ColorOptionalAxle hole (mm) 12Chain wheel specification 420,428No. of gears 36,37,38,40,41Suitable for motorcycles JH70 Chongqing motorcycle parts YJ70 motorcycle buffer