1986-1991 Kawasaki 650 X-2 Service Manual, Page 190Get this manual
20-16 SUPPLEMENT1991 MODEL High Altitude P,erformance Adjustment
The normal carburetor settings are best for sea levelIf the watercraft is used at higher elevations, the lower atmospheric pressure makes the carburetion riche,rTo obtain the proper carburetor setting at higher elevation, turn in the high speed screw according to the following table
Altitude
Tum the high speed screw in the normal position
1000 (3300)
2000 (6600) 3000 POOOO)
AReturn Fuel Hose Pulse Hose
Main Fuel Hose