Flying Horse 48cc/66cc/80cc 2-Stroke Motorized Bicycle Engine Clutch Plate &ndash; Gas bike Clutch Plate Replacement The Clutch Cover helps engage the clutch for most 48cc and 66/80cc 2-stroke motorized bicycles To install the clutch cover, remove the gear case cover. Remove the clutch flower nut and locking screw from the stock clutch plate. Replace the stock clutch plate with the new plate, secure the flower nut and locking screw again, and you're ready to go Note: be sure that the clutch plate is making the correct amount of contact with the clutch pads in the bevel wheel. Too much contact will lock your rear wheel and drive sprocket, not enough contact and your engine will not engage