250ex drive shaft problems

[sheaff400ex]

My cousin has a 2001 250ex that seems to have a clunking noise coming from the drive shaft or rear end. When you hit the throttle there is a slight delay before the slop in the drive is taken up-it makes one heck of a clankng noise. I'm familiar with chain drive quads, but would appreciate any input on what parts to replace in the rear end of this 250ex.

Thanks in advance

-Ryan

[cb550man]

Seems to me you have a problem with the U joint. It is the same as a car. You need to take it in or tear down the swing arm to get to it because everything is enclosed.

[RideRed250ex]

Originally posted by cb550man
Seems to me you have a problem with the U joint. It is the same as a car. You need to take it in or tear down the swing arm to get to it because everything is enclosed.

Sounds like thats about the only way.

[sheaff400ex]

Thanks for the replys guys. I pulled the two caps that cover the swingarm pivot bolt. Instead of a nut being in the there, there is and allen bolt. Does anyone know what size that swingarm bolt is?