'Lucas Copy' ignition coil for Triumph 500, 650 and 750 motorcycles from 1963-1966. They can be used on later unit models if you are converting to a 12 volt Boyer electronic ignition (the coils produce a stronger spark because of the ohm resistance). We use these coils on our builds and they are virtually bulletproof. We highly recommend that you use copper core wires with your new coils, especially if you are running modern electronic ignition systems. We also recommend spark plugs for your motorcycle.