1989 Ski-Doo Repair Manual, Page 267Get this manual
Section 03 TRANSMISSION Sub-section 03 (DRIVE PULLEY)
GENERAL
Some drive pulley components (return spring, counterwelght, calibration washer) can be changed to improve vehicle performance in high aititude regionsThe'high altitude technical data booklet" (P 484 0552 00 and 4840545 00 for binder) gives information about calibration according to altitude
CAUTION: Do not use any type of pin other than the tool PIN 420 8766 40(TYPICAL
CAUTION; Such modifications should only be performed by experience mechanics since they can greatly affect vehicle performanceWARNING: Drive pulley repairs that include any disassembly or assembly procedures must be performed by an authorized Bombardier dealer, or other such qualified personSub-component installation and assembly tolerances require strict adherence to procedures detailed