okay, thanks. So when I put the new Digiplex on and got it going it hummed away nicely. It wouldn't do that if there was a coil spark issue would it? So, because of the clunking in the engine case when turning over to start - that's why I am thinking it's the sprag clutch, just not turning it over enough. Something I read says engine can clunk if backfire of starter motor. I'm trying to read to figure out what causes what.paso750 wrote:No, there´s no way the spark timing can vary. The pick ups get their signal from the flywheel which is mounted on the crankshaft which is turned by the starter. So no matter if the starter turns fast or slow the "firing signal" to the CDI unit will always be right or let´s better say as set by the pick up (bracket) position.In turn that means the spark isn't timing with the turn over, correct?
G.
The only thing I haven't done electrical wise is measure the output of the pick-ups, as you said (check pick-up/flywheel clearance and pick up bracket marks - if nothing was done to these parts this is not necessary). But, since I had not ever done anything to these parts, I have presumed not necessary to check. And before my start problems the battery was not running down.