Flying Horse 48cc/66cc/80cc 2-Stroke Motorized Bicycle Drive Sprocket Removal Tool &ndash; Gas Bike Sprocket Puller The Drive Sprocket Removal Tool will remove both the drive sprocket and large bevel gear from your 2-stroke 48cc or 66/80cc motorized bike engine To use, simply thread the tool in to the center of the drive sprocket or bevel gear. With a socket wrench, crank the free end of the tool down. When you make contact with the body you will see the piece begin to lift from the motor- it's that easy