JJ, I'm as confused as Kurt in S.A. about the electronic ignition plus booster thing. Can you please clarify? Like Kurt, I have the Dyna III ignition, just like this:
Is this is what is in the bike or something different? If so I would be checking the mounting of the sender plate, the pickups on the plate and the rotating magnet's attachment to the camshaft. Also make sure the ATU weights are lubed and free to move.
If the bike shows no spark immediately after stopping but it returns when cool I would be suspecting the electronics in the box.
Ah, I've just done some googling and apparently folks will sometimes add a Dyna Booster to bikes with electronic beancan ignitions, so maybe this situation is not so weird. Anyway, I'm still keen to know what is under the front cover and what it is connected to.
and Brunhilde - 1974 R90/6
Graduate, Wallace and Gromit School of Engineering and Design (Pending)