2002 Ski-Doo Shop Manual Volume One, Page 264Get this manual
Section 06 ELECTRICAL Subsection 02 (IGNITION TIMING)
To check the ignition timing, refer to illustration and proceed as follows:
WARNING
Place ski tips against wall, raise rear of vehicle on stand, so that track does not contact the groundDo not allow anyone in front of or behind the vehicle while engine is runningKeep clear of track and do not wear loose clothing which can get caught in moving parts1Connect the timing light pick-up to spark plug cableConnect digital induction type tachometer (PN 529 014 500)