Last weekend I wanted to run my bike upnorth, the weather was -25'C . Besides being hard to start in the cold the beast would not idle for me. I had to stay on the throttle so I had figured either the idle jet was clogged, or the plug was slightly gunked. The solution was to take the bike for a ride, or just simply let it sit in a warm place for awhile. The problem stopped after a short ride. So my guess is if you have this problem, get the bike nice and warm by riding it so that you can melt the frozen idle jet you more than likely have.