2004 Ski-Doo Racing Handbook, Page 152Get this manual
SECTION 05DRIVE SYSTEM
26,28,29, Calibration Screw, Locking Nut and Governor Cup
Calibration screw has notch on top of its head
Example: Calibration screw is set at position and is changed to position 5So maximum engine RPM is increased by about 400 RPMTo Adjust: Just loosen locking nut enough to pull calibration screw partially out and adjust to desired positionDo not completely remove the locking nutTorque locking nuts to 10 Nm (89 lbfin)CAUTION: Do not completely remove calibration screw otherwise its inside washer will fall offCAUTION: Always adjust all calibration screws and make sure they are all set at the same numberA16D0FA