Looks like an old ARD magneto to me. Very popular in their day. Expensive and hard to find but about the best ignition you could get back in the 70's and early 80's.....for those of you to young to remember. LOL You still see one turn up now and then but getting very rare...hard to find parts now.
1980 LTD (changed over the years), 1979 LTD (being rebuilt), 1977 KZ turbo and various KZ's in various states of build. KLX110
