So early this year when I found that the capacitor and the battery
on my BSA B50 weren't playing nice together, I took out the battery
and my B50 became, by comparison, quite an easy and reliable starter. Fast forward a few months, and the B50 was on the bench for a couple of months while I adapted a 230 MM 4 leading shoe Grimeca brake to the front end. Last Sunday, it was ready for a test ride. Wouldn't start. No spark. My assumption was that I had disturbed a wire somewhere, so last night I started looking. Sure enough, the screw connecting the ground wire to the cap had almost completely backed out of the cap. Screwed it back in. Still no spark. Disconnected the cap and hooked up a battery
. Spark! Connected the cap and the battery
. Spark! Tried the cap alone again. No spark! It was too cold last night to start the bike on the battery
and test whether the charging system is working, but the wires from the alternator to the regulator/rectifier showed continuity. So the theory for the moment is that the cap went bad. Question is: Would a shaky intermittent ground kill a cap?
Ed from NJ