The ARD magneto was a very popular ignition for the builders of flat track and TT triumphs. Very reiable, what you have pictured is NOT an ARD. I would suggest that you contact someone who is active in AHRMA flat track, John Skinner in Alabama comes to mind, He specializes in '70's british flat track gear. You should be able to find contact info for him @
www.AHRMA.org If John can't help you, try Beno Rodi, his info should also be available on AHRMA's website.
If you strike out with John and Beno, let me know, I have several friends that are old Triumph flattrackers we could get some leads from. Good luck.
[ This message was edited by: OldTimeBiker on 2006-06-24 21:56 ]