The correct spark plug is important to maintain optimal combustion chamber temperatures and ignition of the fuel charge.
The Champion N4 is a conventional spark plug compatible with many vintage British motorcycles.
The coils, spark plugs, spark plug wires, and contact points all work in concert to provide ignition for the engine to run.
The spark plug is threaded into the cylinder head. The correct gap must be set to maximize optimal sparking.
Champion N4C plug replaces NGK B7ES and BP7ES. You get a brand new Champion N4C plug, we also sell these in the slightly ‘cooler’ heat range N3C as well as NGK B8ES, BP8ES and BP7ES.
Please note: Due the nature of the product, we unfortunately do not accept returns on bearings, service tools or electrical components. Please be confident about your purchase before ordering. If you have questions, please contact us.