THE 6V COILS MUST BE USED WITH BOYER ELECTONIC IGNITION (THE COILS PRODUCE A STRONGER SPARK BECAUSE OF THE OHM RESISTANCE). WE USE THESE COILS ON OUR BUILDS, THEY ARE VIRTUALLY BULLET PROOF. WE HIGHLY RECOMMEND YOU USE COPPER CORE WIRES WITH YOUR NEW COILS, ESPECIALLY IF YOU A RUNNING MODERN ELECTRONIC IGNITION SYSTEMS. WE ALSO RECOMMEND USING THE PROPER SPARK PLUGS FOR YOUR MOTORCYCLE. PLEASE CHECK OUT OUR STORE FOR ALL OF YOUR BRITISH MOTORCYCLE NEEDS. VINTAGE TRIUMPH SUPPLY SPECIALIZES IN VINTAGE BRITISH MOTORCYCLE PARTS. WE HAVE OVER 10,000 PARTS AVAILABLE. WE HAVE OVER 10 ...