Kawasaki Ninja Owners Manual: Kawasaki Clean Air System

Kawasaki Ninja Owners Manual / Maintenance and adjustment / Kawasaki Clean Air System

The Kawasaki Clean Air System (KCA) is a secondary air suction system that helps the exhaust gases to burn more completely. When the spent fuel charge is released into the exhaust system, it is still hot enough to burn. The KCA System allows extra air into the exhaust system so that the spent fuel charge can continue to burn.

This continued burning action tends to burn up a great deal of the normally unburned gases, as well as changing a significant portion of the carbon monoxide into carbon dioxide.

Air Suction Valves

The air suction valve is essentially a check valve which allows fresh air to flow only from the air cleaner into the exhaust port. Any air that has passed the air suction valve is prevented from returning. Inspect the air suction valves in accordance with the Periodic Maintenance Chart. Also, inspect the air suction valves whenever stable idling cannot be obtained, engine power is greatly reduced, or there are abnormal engine noises.

Air suction valve removal and inspection should be carried out only by a competent mechanic following the instructions in the Service Manual.

Valve Clearance

Valve and valve seat wear decreases valve clearance, upsetting valve timing. NOTICE If valve clearance is left unadjusted, wear will eventually cause the valves to remain partly open; which lowe ...

Exhaust Device

This motorcycle is equipped with a exhaust device system. This system controls the valve in the exhaust pipe and produces stable engine power at low and middle engine speed. This exhaust device i ...

Other materials:

Swingarm Bearing, Sleeve Inspection
NOTICE Do not remove the bearings for inspection. Removal may damage them. Inspect the needle bearings [A] and ball bearing installed in the swingarm. The rollers and ball in a bearing normally wear very little, and wear is difficult to measure. Instead of measuring, visually inspec ...

DFI Parts Location
Main Throttle Sensor [A] Subthrottle Sensor [B] Idle Speed Control Valve Actuator [C] Subthrottle Valve Actuator [D] Intake Air Pressure Sensor #2 [E] Stick Coils #1, #2, #3, #4 [F] Air Switching Valve [G] Intake Air Pressure Sensor #1 [H] Water Temperature Sensor [A] Primary Fuel Injec ...

Connecting Rod Bend Inspection
Remove the connecting rod big end bearing inserts, and reinstall the connecting rod big end cap. Select an arbor [A] of the same diameter as the connecting rod big end, and insert the arbor through the connecting rod big end. Select an arbor of the same diameter as the piston pin and ...