Flying Horse 2-Stroke Motorized Bicycle Drive Sprocket Case Cover &ndash; Gas Bike Sprocket Case Cover Replacement The Drive Sprocket Case Cover houses your drive sprocket to keep your chain on the motor; protects the clutch actuator bearing and bucking bar from falling out; and houses the clutch arm to engage/disengage the motor Installation is a breeze: simply unbolt your stock cover, remove, replace with this cover, bolt down, and you're good to go Compatible with most 66/80cc motorized bicycle engine kits, including Flying Horse, Mega Motors, Grubee, Stinger, RAW, and Power King engine kits