A few months ago, I bought a B11 with sidecar.
After a few weeks, I got the dreaded starting �click�.
Battery was ok.
I thought "Startus interruptus".
Wrong, it turned out it already had the right cure (fused wire from battery to starter relais and from there to starter engine).
I had it towed to the dealer, who blamed a dodgy starter relais that made the "floating" fuse (is that the right English term?) of the extra wire blow.
After new relais, things went well for a week or so.
Yesterdag, waiting with shut engine at a railroad crossing.
With - of course - some 15 cars behind me: Click.

Same fuse blown. Luckily had a spare.
Any ideas about the possible culprit?