1989 Ski-Doo Repair Manual, Page 300Get this manual
Section 03 TRANSMISSION Sub-section 05 (PULLEY DISTANCEALIGNMENT)
PULLEY DISTANCE It ALIG'NME'
GENERAL
The pulley distance we will refer to, in this section, is the space separating the drive and driven pulley outside diameters ("z" measure!This basic dislance is provided as an assembly guide and indicales the dimensions bellNeen which salisfactory belt deflection will be obtainedBoth pulley distance adjustment and pulley alignment must be carried out to ensure the highest efficiency of the transmission systemFurthermore, optimum drive belt operation and minimal wear will be obtained only with proper pulley alignmentCAUTION: Before checking pulley adjustment, the rear suspension must be mounted on the vehicle and track tensionalignment must be doneAlways check pulley adjustment after suspension is adjusted WARNING; Failure to correct1y perform pulley alignment may cause the to creep forward at idle
Measuring procedure
Using straight bar: Always measure distancesfrom the farther straight bar side (including its thiCkness to the inner half edge ELANALPINE II 503