Polaris 120 Pro X Owner's Manual page 70

ADULT SECTION
Maintenance
Track Adjustment
If the track needs adjustment:
1. Loosen rear idler shaft bolt (D).
2. Tighten or loosen the track adjusting screws (E) as necessary to
provide equal adjustment on both sides of the track.
3. Repeat measurement on the other side of the track.
NOTE: Check more frequently when the machine is new.
4. Start machine and slowly rotate the track at least five revolutions,
let the track stop rotating by itself (do not apply brakes).
5. Check track alignment (side to side) by comparing the distance
from the drive lug to the Hi-fax on both sides. Readjust until
centered.
6. Tighten idler shaft bolt.
7. Readjust the toe block to proper spacing and tighten.
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