This "Care and Feeding of the CVK40" article is very good, but I found a small error.
"Pilot System-Steering you to better lows" The very last sentence.
The pilot mixture screw Primarily controls Fuel not air.
So opening the screw richens the idle mixture.
Yea, I know, pickey, pickey, pickey.
My understanding, the idle mixture screw meters air/fuel mixture
Yet, the Kawasaki nomenclature for the screw (Fiche Reference 16014) is, "SCREW-PILOT AIR."
For discussion, I copied the last sentence in the "Care and Feeding" article:
"When you adjust the pilot screw that's under the carb, you are varying the amount of air premixing with the gas before it enters the venturi."
Generally, a pilot screw on the intake side is an "air" screw; on the engine side, a "fuel" screw.
Again, I thought the CVK40 idle mixture screw controlled the flow of a mixture of air and fuel from the pilot jet to the venturi; backing the screw out fuel-enriched the idle mixture, or so I thought.