1996-2002 Kawasaki 1100ZXi Jet Ski Factory Service Manual., Page 42Get this manual
2-12 FUEL SYSTEM
High Altitude Performance Adjustment
The normal carburetor settings are best for sea level If the watercraft is used at the higher elevations, the lower atmospheric pressure makes the carburetion richerTo obtain the proper carburetor setting at higher elevations, turn in the high speed screw according to the following tableAltitude (f)
Turn the high speed screw in the normal position
18 turn 14 turn 38 turn