The bike had been running fine. I'd taken it for a few test spins around the block. Booked MOT for a couple of Saturdays ago, went to ride it there and it would only start on two cylinders!
. Since, I've found a faulty plug cap but it's made no difference and I've fitted a new ignition coil, points and condensers and cleaned out the carbs (again!) and it still isn't running right on 1 and 4. Do the generator windings, regulator or rectifier have ant effect on the spark? I did change them recently for some which seemed to charge the battery better. Also could any of the wiring in the headlight effect this? I did have to remove the headlight to refit the parking bulb, as it had fallen out, the evening before. I have looked in there since but looks OK.
Another thing I just remembered. The points for cylinders 2&3 are sparking quite a lot, whereas I cannot see any sparking on the points for 1&4.
Cheers guys in advance.