1999 Ski-Doo Factory Shop Manual Volume Two, Page 233Get this manual
Section 05 TRANSMISSION Subsection 07 (CHAINCASE)
5,16, Sprockets
Position the sprockets with the writing facing the chaincase cover
18, Circlip
CAUTION
27, Conical Spring Washer
Install washer with its concave side towards drive pulley
It is of the utmost importance to install the circlip otherwise damage to the chaincase components may occur
DRIVE CHAIN ADJUSTMENT
NOTE: Brake disc key must be in good condition before checking chain free play
10, O-Ring
Replace both O-rings no10 on tensioner adjustment screwFully tighten tensioner adjustment screw by hand, then back off only far enough for hair pin to engage in locking holeThis initial adjustment should provide 3-5 mm (18-1364 in) free-play when measured at the outer circumference of the brake disc
A03D14A
4, Upper Sprocket Castellated Nut