The brother of my friend got that problem too. A week before I buy my 850, he told me to not buy this atv...It seem that problem is common, Maybe it will have a recall for bad starter?! Maybe the problem is the starter itself, or maybe the tranny fluid is too thick when its really cold...or bad relay??! who knows..My budds 2011 850 xp just did the same thing for the 3rd time. Been to the dealer twice now and already had a new battery installed once. This Time (today) is was costly cuz we were 5 hours north riding, hotel, gas, and had to return. Dropped it off at the door of the dealer even with it being closed. :irked:It also lost power, almost sounds like something in the motor went. Seems like the XP doesn't like the cold weather?