Does anyone know proper specs on the amount of tension on rear axle nuts which determines amount of wobble/free-play of rear axle upon bearing?

 

I always tighten the axle nuts with a big pipe wrench and usually get them about as tight as I can and put lock-tite on them.. If your axle nuts are tight and you have play, then you need some new axle bearings.

 

raptor 450, i agree with what you just said. there really shouldn't be any play at all. if there is play your tires wouldn't track right and that would cause unstable riding, and excessive wear on your tires as well, possibly on your sprockts as well