Been having running problems with the bike. Would start and run perfectly, but after a few miles, just cut out !
After ten minutes it would run again but only for a short while. Not a fuel problem so reasoned that it was something electrical breaking down when hot.
Usual suspect for this is the condenser(capacitor), but figured that if I was going to remove the flywheel, which meant buying a puller, as I've no idea where mine are, I might as well change the points. Sod the expense, I'll change the HT coil, lead and plug cap at the same time.
Did all this and went for a test ride. Running like an absolute dream.
Five miles out and d'oh ! It cuts out again !
Getting back home was, ride - cut out, let it cool a bit, ride - cut out, let it cool a bit, ride.......................
Problem turned out to be really simple and the one thing I hadn't changed. The damned
spark plug !