1989 Ski-Doo Repair Manual, Page 255Get this manual
Section 03 TRANSM ISS ION Sub-section 02 (DR IVE BELT)
8Flex cracks between cogs
a) Considerable use, belt wearing out
a) Replace belt with correct Bombardier beltADOO 003 016
a) Improper belt installation b) Belt rubbing stationary object on pulleysc) Violent engagement of drive pulley
9Sheared cogs, compression section fractured or torn