1996-2002 Kawasaki 1100ZXi Jet Ski Factory Service Manual., Page 21Get this manual
GENERAL INFORMATION 1-15
Kawasaki Air Induction System (KAIS)
KAIS is system to reduce the coefficient of friction or drag between the bottom surface of the hull and the water
This system features small air outlets [A] at the end of each inner strake When in motion the fast flowing water will create vacuum] and draw air out of the engine compartment [C] to form an air-bubble film between the hull and the water