Alright first post here, I got my first sled this summer its 96 xcr sp 600. When I got in the motor was just rebuilt, read up on the break-in and it ran awesome. Went for a ride yesterday and when I would come up to a stop I would here what I thought was a back fire but by the end I found the clutch would not release and kill the motor and would pop when it released. Sometimes when I would pull start it would jump forward and die. When stopping while breaking if I gave it throttle it would let go. On take off its vary jerky. On the clutch I can push it in a bit if I spin it 180 I can't budge it. Any thoughts would be helpful thanks.