I have a fairly well used 2011 Polaris 800 Crew w/lift kit. Recently when driving I experience a loud "klunk" sound immediately followed by a sudden jerk to the right in 2WD. I drove it a while in 1WD and did not feel nor here the same, then put it back in 2WD. Same issue, perhaps not as bad a sound and jerk of the steering. Stopped it, put it in reverse, back in 2WD same thing.

Any ideas?

 

Since it has a lift kit I'd jack it up and check the cv joints first. Doesn't matter if you have Gorrilla drives shafts,ect,lift kits can cause premature wear. It says that on most of the kits packaging.