When the engine is running, the air intake valve is lifting up.
If the valve does not operate properly, check the air intake solenoid valve hoses for leak.
If there are no leaks, check the air intake solenoid valve.

Air Intake Solenoid Valve Unit TestSport-kawasaki traction control (s-ktrc)
S-KTRC is an intelligent system that
calculates the slip level of the rear
wheel (wheelspin) and is suitable for
sports riding conditions. S-KTRC is
designed to function on public roads.
Acceleration may be delayed under
certain circumstances depending on
road conditions. S-KTRC cannot resp ...
Air Cleaner Oil Draining
A drain hose is connected to the bottom of the air cleaner
to drain water or oil accumulated in the cleaner part.
Visually check the drain hose [A] if the water or oil accumulates.
If any water or oil accumulates in the hose, remove the
plug [B] from the drain hose and drain it.
...
Tire Removal
Remove:
Wheels (see Front/Rear Wheel Removal)
Valve Core (Let out the air)
To maintain wheel balance, mark the valve stem position
on the tire with chalk so that the tire can be reinstalled in
the same position.
Chalk Mark or Yellow Mark [A]
Valve Stem [B]
Align [C]
Lu ...