2005 Ski-Doo RT Series Shop Manual, Page 175Get this manual
Section 05 ELECTRICAL SYSTEM Subsection 01 (IGNITION SYSTEM)
Screw the adaptor into the spark plug hole and tighten to prevent movement in the plug hole Position the dial face toward the PTOMove the gauge down until the needle just begins to move, then move down further or mm (approximately 14 in)Tighten adaptor lock nut by hand Locate the piston TDC position as follows: Slowly rotate the drive pulley back and forth across TDC while observing the needleNote that the needle stops moving only as the piston is changing direction Rotate the dial face so that "0" is in line with the needle when it stops moving Again, 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 direction "0" now indicates exact TDC Rotate the drive pulley counterclockwise, onequarter turn then carefully rotate it clockwise until the needle indicates the specified measurementENGINE 995 SDI MEASUREMENT 7.87 mm (0.310 in)