<p><b>Specifications</b><br /> Material: Metal<br /> Shaft Size: 5/8" with 3/16" keyway<br /> Shaft size: for driven clutch is 5/8'' with 3/16'' keyway<br /> Forward Ratio: 1:1:3<br /> Reverse Ratio: 1:2:6<br /> Gearbox Speed: 5/13 of the Clutch speed<br /> Shifter Cable Length: 1540mm  ( 5' )  ( 60'' )</p> <p><b>Package Contents</b><br /> 1 X Forward / Reverse Gearbox with 3/16" Keyway<br /> 2 X Mounting Plates<br /> 1 X Shifter Disc<br /> 2 X Shifter Cable<br /> 1 X 10T and 12T Sprocket<br /> 1 X Shifter Assembly</p> <p><b>Tips</b><br /> This product was filled with oil before leaving the factory.<br /> When the oil is used up, it needs to be filled to half of the box<br /> This go-kart gearbox is use GL-5 gear oil</p> <p><b>Note</b><br /> Instruction not  include, professional installation is recommended<br /> If you need the insatllation instruction pls contact us</p>