i was out sledding today and had made it about 5 miles down a trail and the sled was running perfect, and sure enough i stoped and shut my sled off. ( a 2007 summit 800r with 700 miles) I went to start it back up 2 min later and nothing. the electric start and pull start were about the same would try and turn it a little bit but the sled would try and go backwords a bit. i took the belt off and tried this again and it still tried to go backwords. i could turn the primary clutch backwords and forwords forword taking a fair amount of work to do it but the sled would still try and move backwords. i pulled the plugs to see if any different and was still the same. i am pretty much stumped does this sound like a siezed motor or could it be somthing different. up to when i shut it off the sled had made no wierd sounds and was running perfect. any one have any suggestions?