【Wide Compatibility】This transmission gear box and centrifugal clutch assembly fits 43cc 47cc 49cc 50cc 2-stroke T8F pocket bike scooter ATV go kart mini bike dirt bike pit bike 【Specifications】Reduction Ratio: 3 to 1 chain reducer. Mounting hole distance(adjacent): 2.97"/75.5mm, mounting hole distance(across): 4.13"/105mm. This is 91mm, not 116mm, and the size is marked in the picture 【Fits Various Sports Vehicles】There are five different front drive sprockets available for five different sizes, specially made for a T8F chain. You can choose and replace sprockets according to the torque and speed you need. 【Crafted For Durability】Heavy duty reduction box twin-chain design for bigger torque transmission than standard reduction box with single chains. The sprocket gear underwent heat treatment to enhance resilience against wear and tear. 【Complete Kit】Install the transmission kit set easily with the included accessories: 1 x reduction box + 1 x clutch + T8F 11T 13T 14T 17T 20T drive sprockets + 5 x spring steel retainer clips. Detailed installation steps are shown in the video Heavy Duty Gear Reduction Box and Racking Clutch Set for 43/47/49cc Pocket Mini Bike / Scooter / ATV. This gear box with twin-chain design for bigger torque transmission than standard reduction box with single chains.

Please confirm size of your original part. This is 91mm, not 116mm. We marked the size in the last picture.

The reduction box comes with 11,13,14,17,20 teeth total 5 pcs of sprockets.The sprocket is compatible for T8F chains.The transmission kit should fit most 47cc/49cc 2-stroke pocket Bikes.

Reduction Ratio: 3 to 1 chain reducer
Condition: Brand New
Material: Made of aluminum alloy
Color: Black

Package Includes:
Gear Reduction Box x 1
T8F 11T Sprocket x 1
T8F 13T Sprocket x 1
T8F 14T Sprocket x 1
T8F 17T Sprocket x 1
T8F 20T Sprocket x 1
Mounting Bolts Kit x 1

About Parts Quality and After-sale Services:
Please contact with us if there's any quality or other problem.