I have a 2000 yahama kodiak 400 auto 4/4 I allowed a friend to borrow it one day and he used it to pull post out of the ground to repair his boat dock. When Igot it back it would hardly move forward with the throttle full open. I replaced the drive belt that is on the right side and it will now move but only very slowly 5 -10 mph at the most can any one guess at what else could have been dammaged by this whole mess.