Flying Horse 2-Stroke Motorized Bicycle Engine Clutch Screw Base &ndash; Gas Bike Clutch Cable Case Mount The Clutch Screw Base divides the heat shield and extension springs on your clutch cable Installation is simple: right behind the cylinder you'll see the stock clutch screw base. Turn the stock screw base out and screw the new base in to its place. Send the clutch cable through the clutch screw base and you're ready to ride