1989 Ski-Doo Repair Manual, Page 254Get this manual
Section 03
TRANSMISSION
(DRIVE BELT)
Sub-section 02
4Belt worn narrow in one sectionCAUSE Excessive slippage in drive pulley caused bya) Frozen or too tight trackREMEDY
b) Drive pulley not functioning properlyc) Engine idle speed too highd) Incorrect belt length
e) Incorrect pulley distance
a) Liberate track from ice or check track tension and alignmentb) Repair or replace drive pulleyc) Adjust to specificationd) Using unspecified type of beltReplace belt with correct Bombardier belte) Readjust to specificationsI
Aooa 003 012
5Belt sides worn concaveCAUSE REMEDY a) Repair or replaceb) Replace belt with correct Bombardier belt