1985 Ski-Doo snowmobile Service Manual, Page 400Get this manual
Section 05 SUSPENSION Sub-section 03 (TRS SUSPENSION) -
Remove chaincase and oil injection reservoir vent hole plugs
NOTE: On all models, the holes in the frame provide the possibility of locating the suspension arms for easier track tension adjustment 13 mm (112") clearance It means that if the slide suspension adjustment screws are at the maximum adjustment and the suspension arms are at the front holes in the frame, you may move the suspension arms at the rear holes and obtain greater track tension adjustmentCAUTION: Ensure that suspension arms are at the same position on each side of the frame to avoid any damage to the suspension system and to the track
h,sl hole
Perpondlcular to ground
CAUTION: Ensure that front and rear suspension arms are at the same position on each end (front, rear) of the frame to avoid any damage to the suspension system and to the track