Cold weather issue

Hi,
While driving to work the other morning, about 39 degrees, I hit 55 and seemed to have a little misfiring. When I backed it down to 45 it went away. And when idling at the lights it seemed fine. On the way home it seemed to be OK. The day before, the bike got a little wet from an afternoon rain shower. But ran fine on the way home. Is there an issue with the cold and or rain? I have had it out before when it was close to that cold with no problems.
Thanks
Dave

 

I've ridden in downpouring rain, and others have started and ridden in 20* weather. You couldn't hurt things by cleaning every electrical connection you can find and unplug. Also check the condition of your plug wires.
The symptoms you gave also relate to bad gas, old or mis-gapped plugs, pilot screws adjusted a bit lean, the list could go on.

 

All of the above is good advice; I might add:

Clean off the outside of the coils with a benign solvent like mineral spirits or rubbing alcohol and then examine them closely. You're looking for MICROcracks which can sometimes develop along the natural "fault lines" in the swirly plastic.

If you find any, clean them carefully with a less benign solvent like lacquer thinner or carb cleaner and then apply liquid electrical tape or rub black silicone RTV into them.

"Frosty morning syndrome" is not uncommon.

 

OK, So, while riding home from work yesterday, I sat a a stop light with my blinker on. Not blinking. I tried my high beams, killed the engine. I got home using hand signals and tore open the alternator. It was dirty. Cleaned it up with some really fine sand paper and WD-40. And now she runs like a clock. Could this have been my misfiring culprit?