Not sure when the problem showed up, I just noticed it the other day. Rode the bike to work yesterday, went to start, running on one cylinder again. Reached up under tank, jiggled wires to coils, now running on two again, long enough for me to get it home. Removed seats, tank, Procom, plug wires and valve cover to measure valves, Only 3 out of 8 valve clearances outside of dimensions, 2 intake and 1 exhaust are out of tolerance. The 1 exhaust is at like .31mm, and 2 intakes are slightly out, but nothing major. Will correct the 3 that are out, then re-assemble and snug up all electrical connections, replace plugs and wires...She'll be alright...