I have a 01 scrambler 500 and a 98 scrambler 400 they both do this, put the back end up on jack stands with the front tires on the ground,start it up and put it in two wheel drive and let it idle with the back wheels turning slowly, notice that the front wheels are wobling, even though the are not turning, ? the dealer could not tell me why, does anyone know about this?

 

You may have a bent front axel

 

Although ive never seen this first hand it wont be because of a bent front axle, not in 2wd anyway. This is probably due to just normal vibrations. If uve noticed when u get off either of the beasts and watch it idle they both shake pretty bad. So Id have to guess thats why the front wheels where wobbling but ill check it out tomorrow