Transmission Gear Box Main Counter Shaft KitSpecifications:--Manufacture : China--100% Brand New--Material: Steel --Package Includes: 1 x Main Counter Shaft set --Note: Installation Instruction NOT Included Fitment For : For : 56mm Bore 140cc Horizontal Engine (1P56YMJ )For : 56mm Bore YinXiang 140cc Horizontal Engine (1P56FMJ W063)For : 56mm Bore YinXiang 150cc Horizontal Engines (1P56FMJ-5 W150-5)For : 60mm Bore YinXiang 150cc Horizontal Engines (1P60FMJ W150-2)For : 60mm Bore YinXiang 160cc Horizontal Engines (160FMK W160-2)For : 60mm Bore YinXiang 150cc Horizontal Engine (1P60FMJ W150-4V)For : 62mm Bore YinXiang 160cc Horizontal Engine (1P60FMK W160-4V)For : KAYO BSE Bosuer Xmotos Apollo Orion Rusi SSR SDG GPX GMX Pitsterpro Mobster thumpstar YX 140cc 150 160cc Dirt Pit Bikes