... , OEM service or after service offered 3, Engine Transmission Gear for Balance Shaft is suitable for kinds of motorcycle ... gear, Generator gear, Auto gear, Tractor Gear, Truck and Bus Gear, Electric motorcycle gear, Other Machinery Gear, etc.6, Material: 20CrMnTi, C45, 40Cr, 20CrMo, stainless steel or ... ISO6/GB6Ring gear4001-10 11, Factory pictures: Engine Transmission Gear for Balance Shaft