Slip on pipe and K&N Air Filter. No airbox lid. Machine was backfiring out of the carb with the 22.5(stock) pilot jet. Went to a 27.5 and it was backfiring out the exhaust. Now I have a 25 in it and it has a slight stutter. Not so much a backfire. Happens at idle and when coming to a stop, so I am guessing it has to be the pilot circuit. Is it possible my float is adjusted to allow too much fuel? I saw a slight wet spot under my overflow tube after it idled for a couple minutes. Would slightly too much fuel cause it to do this? I uploaded a video, it does it twice during the video. Thanks in advance guys. http://www.youtube.com/watch?v=czJAZYhH1ys