Harley-Davidson Fuel Tank Caps

Harley-Davidson fuel tank caps seal the fuel tank filler opening and may be a keyed or non-keyed design depending on the model and security level desired. Replacement caps are needed when the original cap's seal deteriorates, the locking mechanism fails, or when a different style is desired for customization.

Cap fitment depends on the tank neck diameter and whether the cap uses a bayonet or threaded attachment. For keyed caps, confirm whether the replacement key can be matched to existing locks on the bike for convenience.