2007-2009 Kawasaki KFX50 service manual, Page 98Get this manual
5FUEL SYSTEM CAUTION
Be careful not to damage the jets and jet holder when removing themDo not force the screw against its seat to avoid seat damageBe sure to install the O-ring in the reverse order of removalSprings
Air Screw ASSEMBLY Reverse the "DISASSEMBLY" proceduresInstall the needle jet into place so that the smaller end of the jet goes in firstWhen installing the air screw, return it to the original position as noted during removal Refer to the "CARBURETOR IDLE SPEED" section in the chapter to perform the idle speed adjustmentAfter the carburetor is installed, be sure to perform the Exhaust Emission TestNeedle Jet Holder Needle Jet