During last weekends ride my GW developed a very rough engine and loss of power. The engine miss was most noticeable at low speeds, however I could tell it was there at highway speeds as well.
Short version of two days of head scratchin.
Removed the spark plug covers on both sides, waited till dark and started the engine. Waited two more days, laid out 88 dollars and spent three hours installing new plug wires.
Runs great, and this bike has less than 10,000 miles since new. #5 plug wire had a hole burnt clear through the boot at the spark plug. I suppose this little malfunction had the computer a bit confused.