Wondering if anyone could give some advice on the difficulties of rebuilding an old horn? I have an '74 Super frame that was made for the American market. So it has the larger horn diameter than a European large frame. I can't get it make any sort of noise and I have measured that the switch is putting current through the horn. I haven't been successful at tracking down a american diameter horn so I was wondering what it would take to rebuild it, or just clean it up internally.
Has anyone pulled apart a horn assembly and rebuilt one before? I want to understand what it takes before drilling out the rivets that are currently holding it together and potentially wrecking the thing.