Just wondering what are the spec. for the track tension and adjusting(side to side) also. What are some methods of doing it? Ex: warm up sled then do the work....etc. Any info is great

i wouldn't worry about warming it up...makes no difference. Just jack up the back end (they recommend putting the skis against a wall or something for safety, although i do not do that).

Tension: Loosen rear wheel bolt and back off stop nuts on shaft adjustment bolts. Polaris recommends using a 10Ibs weight about 16-18" in front of rear wheels and adjusting shaft bolts until tension is something crazy small like 3/8"-1/2" (can't remember without looking in the book). Most people though say run it as loose as possible without ratcheting. I would definitely run it tight enough so as to not chew up the front cooler if your sled has one. Tighten everything back up when done.

Alignment: Start it and rev it to get the track spinning, let go of the throttle and hit the kill switch, NOT the brake or the track could go crooked. Measure distance between outside of slider and drive lug on each side. Loosen rear wheel bolt, back off stop nut on shaft adjustment bolts (1 each side) and adjust as neccesary doing the opposite to each. For example, if slider/drive lug distance is too small on left side, loosen the left side adjustment bolt maybe 1 turn and tighten the right side 1 turn (this keeps track tension identical). Start sled, rev and kill and check again. Tighten everything back up when done. I actually find an easier way is just start the sled on the stand and (if the track creeps a bit on its own) adjust on the fly and centering the rear end of the rails/sliders in the track windows.

hope this helps.