2002 Ski-Doo Shop Manual Volume Two, Page 188Get this manual
Section 06 ELECTRICAL Subsection 02 (IGNITION TIMING)
3Locate the piston TDC position as follows: aSlowly rotate the drive pulley back and forth across TDC while observing the needleNote that the needle stops moving only as the piston is changing directionbRotate the dial face so that "0" is in line with the needle when it stops movingcAgain, slowly rotate the drive pulley back and forth across TDC and adjust the dial face to "0", until the needle always stops exactly at "0" before changing directiond"0" now indicates exact TDC4Rotate the drive pulley clockwise, one-quarter turn then carefully rotate it counterclockwise until the needle indicates the specified measurement, indicated in TECHNICAL DATA5Scribe one mark on removable side member upper ridge and one on lower ridge just above drive pulley center lineThese both marks will be used as reference point6With the TDC gauge indicating specified timing, scribe mark on drive pulley inner half in line with both marks previously scribed on removable side member1