My daughter was riding her kart yesterday and she said she was goin down the road and the motor just would rev up and not move. Is the drive belt the most likly thing that would go out. The cable moves when you go from foward to reverse and the cable moves the shifting lever on the tranmission, but it just revs up and does not move the kart. is there a way to tell if it is the belt without taking the cover off. Please tell me what you can Daughter wants it back up and running.