I've had an intermittent issue for a while now, which has recently turned persistent.
When the bike gets wet, or even damp, I lose a cylinder (the furthest on the right when sitting on the bike). Quick inspection revealed that there is no spark- when the bike heats the spark comes back and the cylinder fires fine. When its dry out it runs perfectly fine, even if its cold, or if it rains when the engine is already warm it runs without issue.
First thing I did was to replace the spark plugs, and this fixed the problem- for about a week. Is the most sensible next step to replace the HT leads? I can't figure out where the water is getting in to cause this problem, and don't want to replace a part only for the same issue to return.
Cheers
