It was running and going through gears fine then i shut it off for like 10min. and then it wouldnt shift.. took it apart and there is a big bolt on the small gear that turns directly to the right of the clutch and it was stripped allowing the gear too much play.. fixed that but it still wont shift! no gears are stripped and everything turns and fits right ... i think it is the shift shaft or the shift forks but i am not sure how to fit them or replace them... can anyone help me?