I'm curious to know what causes an ignition coil (and HT lead) to give up on life.
Riding along the A13 last night, 20 miles into my journey and the bike dropped on to the LH cylinder only. The RH one kicked in a mile or so later but soon ducked out of the party again and I completed the remaining 3 miles on one cylinder.
A few hours later it was time to return home, bike started fine and idled without a problem. 15 miles into the return leg and back on to one cylinder (I assume running on the LH one again). Occasionally the other cylinder would put in an appearance but never for longer than a couple of miles.
I'm used to TDMs not behaving in the wet but my problem was happening in the dry. Also, the wet weather misfire caused the bike to stall whereas last night my bike was idling (even if only on one cylinder).
I'm just about to go and poke around, I'm guessing a loose connection or a duff coil as the most likely culprits but would appreciate any thoughts you lot might have. I guess my curiosity is because I'd have thought a coil would either work or not, no intermittent crap.
FWIW, I assume the coils are the original items and are 40k miles/14 years old.