2004 Ski-Doo Racing Handbook, Page 230Get this manual
SECTION 072003 MX Zx 440 INFORMATION
2003 SKI-DOO MX Zx RACING TIP SHEET
SKI-DOO RACING, 7575 BOMBARDIER COURT, WAUSAU, WI 54401 NUMBER: 02 NOVEMBER 22, 2002
WARNING
This information relates to the preparation and use of snowmobiles in comptitive eventsBombardier, Incand Bombardier Corporation disclaims liability for all damages andor injuries resulting from the improper use of the contentsWe strongly recommend that these modifications be carried out andor verified by highly skilled professional racing mechanicIt is understood that racing or modifications of any Bombardier made snowmobile voids the vehicle warranty and that such modifications may render use of the vehicle illegal in other than sanctioned racing events under existing federal, provincial and state regulations
CARBURATION CALIBRATION440 REV
The 440 REV comes stock with very rich jetting, rejet according to the jet chart located on the belt guard
FRONT SUSPENSION BALL JOINTS 440 REVROLLING CHASSIS
Regularly check the torque of the front suspension ball jointsTorque to 4448 ft lbs