1983 Ski-Doo Shop Manual, Page 140Get this manual
SECTION 03 TRANSMISSION SUB-SECTION 02 (DRIVE BELT)
5 Belt sides worn concave ()
CAUSE a) Rouqh or scratched pulley surfaces b) Unspecified type of belt
a) Repair or replace b) Replace belt with correct Bombardier belt
6Belt desintegration
CAUSE a) Excessive belt speed
a) USing unspecified type of beltReplace belt with proper type of belt b) Clean pulley surfaces with fine emery cloth and lubrl cate with low temperature grease
b) Oil on pulley surfaces
7Belt edge cord breakage