Forward Reverse Gear Box Kit. 2HP - 11HP ENGINE 10T #40/41 OR 12T #35 TAV30. 12T Sprocket #35 Chain and 10T #40/41/420 Chain. Shaft Size: 5/8" with 3/16" Keyway.Suitable for # 35 chain 12T or #40/41/420 Chain 10T. Forward Ratio: 1:1:3. Reverse Ratio: 1:2:6. 10T and 12T Sprocket Included. It is the customers responsibility to make sure that this is the correct part for their unit. The item "Forward Reverse Gear Box Kit for 3/4 Comet TAV2 30 40 41 10T & 12T Sprocket" is in sale since Tuesday, April 9, 2019. This item is in the category "Sporting Goods\Outdoor Sports\Go-Karts (Recreational)\Parts & Accessories". The seller is "selliton" and is located in Bluffton, Indiana. This item can be shipped worldwide.