1997 Ski-Doo Factory Shop Manual Volume One, Page 246Get this manual
Section 06 REAR SUSPENSION Sub-Section 04 (DRIVE AXLE)
3, Retainer Ring
Make sure that welded nuts are toward inside of tunnelLock drive axle sprocket with circlipReinstall the chaincase cover (if applicable)Refill with chaincase oilInstall the suspensionRefer to TRACK 06-05 and adjust track tension and carry out track alignment procedure
ADJUSTMENT
SprocketTrack Alignment