i've got a question, i was bashing in my backyard and my truck went out of control, hit a post and flipped over, then it reved wide open and i heard a very bad sound, like metal hitting metal, then it stalled, everything looks ok inside but when i pull the pull start it looks like the clutch nut is not straight because the clutch bell looks like is spins in small circles; does anybody have any ideas. thanks

sounds like you broke a connecting rod. take the motor out pull the inspection plate and have a look.

ok, i will have a look, i dont think thats what it is, because i can take out the glow plug and look in the hole i can see the piston moving up and down, but at the small screw, that holds the clutch bell on looks like it wabbles when the motor is turning over.

Which engine? If it is one without a pilot shaft crank (the ones wheres you screw on an extension) the clutchbell extension may be lose, causing a wobble. Check it out and loctite that sucker

What Savage said, reguarding the clutch getting loose. Another possiblity is a bent crank. I've heard of it happening, but never seen it myself.