I know there are a few posts here about intermittent stalling/stumbling when coming to a stop, or from a stop, such as at a light. I had experienced this a couple of times, not anything to be a real problem, and I sometimes thought it could just be operator error. In any event, when I brought the bike in for its 500 mile service, I mentioned it to the service tech. When I got the bike back he said they adjusted the idle (which I have read here seems to correct the issue for some), and also balanced the throttle bodies. The bike seems to have a more positive throttle response, particularly from a start - no stumbling. I just wanted to mention this in case others were having this issue - this may be a help.