Re: POLARIS XLT GEARS
It would depend a lot on what altitude you ride at. If you put more load on the engine/driveline by dropping a tooth or two on the bottom at higher altitudes, you would also be looking at changing weights springs in your primary to offset the extra load. At near sea level, you should be able to get by with dropping a tooth on the lower gear with, at most, just changing to lighter primary weights.
Just take your wife out in some powder; the SKS should be able to stay ahead there! Good luck...
P.S. I sent you an email in response to your request for pipes for the XLT.