1989 Ski-Doo Repair Manual, Page 350Get this manual
Section 03 TRANSMISSION Sub-section 08 (GEARBOX)
7,70, Tensioner adjustment screwwave pin
Remove wave pin and slack chain tension
2,3,4,7, Chain tensioner, tensioner shaft, rollertensioner adjustment screw
Completely unscrew adjustment screw then remove chain tensionerPull out tensioner shaft (using adjustment screw) to free the roller
29,30, Hard washerplanetary gear
Remove planetary gear and hard washer
14,15,16,17,18,19,23,26,27,28, Spacer, sprocket, spring washer, slotted nut, cotter pin, chain, sun gear, snap ring, hard washersprocket