ApplicationFit for: Forward Reverse gearbox is for go-karts, utility vehicles and other applications with engines up to 11HP Note: Please only use on 30 SERIESSpecificationCondition: Brand New Material: Metal Shaft Size: 5/8\" with 3/16\" keyway Warranty: one year Shaft size: for driven clutch is 5/8\'\' with 3/16\'\' keyway Forward Ratio: 1:1:3 Reverse Ratio: 1:2:6Feature-Wide Application:This is forward Reverse gearbox. it is suitable for go-karts, utility vehicles and other applications with engines up to 14HP and # 35 chain 12T and #40/41/420 Chain 10T (Both sprockets included)-Quality Material:It is made of high-quality metal, which is light and sturdy; it allows the operator to choose three positions: forward, reverse and neutral.-Easy to Install:It is easy to install and complete accessories，suitable for people who like DIY assembly of karts, just follow the operation to complete the installation and use.Package IncludesInclude: 1 X Forward / Reverse Gearbox with 3/16\" Keyway 2 X Mounting Plates 1 X Shifter Disc 2 X Shifter Cable 1 X 10T and 12T Sprocket 1 X Shifter Assembly