OK, probably not a Dyna III problem per se...
I've got a '71 /5 on which the PO installed a Dyna III electronic ignition. While going through my the-wait-for-a-running-bike-is-almost-over tune-up, I ran into a problem when adjusting the timing dynamically: I get a double S (idle) and double F (~3000 rpm) image. According to the Clymer manual, this means I need to replace the advance unit (which the Dyna system retains).
I don't have any experience with the Dyna III or this type of problem, so I thought I'd ask: anything else to consider before springing for a new unit?
There was an earlier thread I came across where the poster had a similar issue and several people advised him to go with a Dyna III to fix the problem. Is there some way to compensate with the Dyna III that I'm not aware of? Would any of the other common electronic ignition systems (Boyer, Omega) solve the problem?