Kawasaki Ninja Owners Manual: Throttle Control System

Kawasaki Ninja Owners Manual / Maintenance and adjustment / Throttle Control System

Check the throttle grip play each day before riding the motorcycle, and carry out maintenance and adjustments in accordance with the Periodic Maintenance Chart. Adjust it if necessary.

Throttle Grip

The throttle grip controls the butterfly valves in the throttle body. If the throttle grip has excessive play due to either cable stretch or maladjustment, it will cause a delay in throttle response, especially at low engine speed. Also, the throttle valve may not open fully at full throttle. On the other hand, if the throttle grip has no play, the throttle will be hard to control, and the idle speed will be erratic.

Inspection

Check that the throttle grip play is correct by lightly turning the throttle grip back and forth.

A. Throttle Grip

B. Throttle Grip Play

Throttle Grip Play

If there is improper play, adjust it.

Adjustment

Loosen the locknuts at the upper of the throttle cables, and screw both throttle cable adjusters completely so as to give the throttle grip plenty of play.
Turn out the decelerator cable adjuster until it has no play when the throttle grip is completely closed.

Tighten the locknut.
Turn out the accelerator cable adjuster until the throttle grip has the proper play. Tighten the locknut.

A. Decelerator Cable

B. Accelerator Cable

C. Adjuster

D. Locknuts

If the throttle cables cannot be adjusted with the adjuster at the upper of the throttle cable, further adjustment of the throttle cables should be done only by a competent mechanic following the instructions in the Service Manual.
With the engine idling, turn the handlebar to each side. If handlebar movement changes the idle speed, the throttle cables may be improperly adjusted or incorrectly routed, or they may be damaged. Be sure to correct any of these conditions before idling.

WARNING

Operation with improperly adjusted, incorrectly routed, or damaged cables could result in an unsafe riding condition. Be sure the control cables are adjusted and routed correctly, and are free from damage.

Air Cleaner

A clogged air cleaner restricts the engine’s air intake, increasing fuel consumption, reducing engine power, and causing spark plug fouling. This motorcycle’s air cleaner element consists o ...

Engine Vacuum Synchronization

Engine vacuum synchronization must be checked and adjusted periodically in accordance with the Periodic Maintenance Chart by an authorized Kawasaki dealer. NOTE Poor engine vacuum synchronizatio ...

Other materials:

Keys
This motorcycle has a combination key, which is used for the ignition switch, steering lock, seat lock, and fuel tank cap. Included with the key is a key number, which may be stamped on a separate plate. Record the key number in the space provided and store the number in a safe place. If y ...

Exhaust Butterfly Valve Actuator Sensor Resistance Inspection
Turn the ignition switch to OFF. Disconnect the exhaust butterfly valve actuator sensor connector (3 pins connector) [A] (see Exhaust Butterfly Valve Actuator Sensor Input Voltage Inspection). Connect a digital meter [B] to the exhaust butterfly valve actuator sensor connector. Measur ...

Piston Ring, Piston Ring Groove Wear Inspection
Check for uneven groove wear by inspecting the ring seating. The rings should fit perfectly parallel to groove surfaces. If not, replace the piston and all the piston rings. With the piston rings in their grooves, make several measurements with a thickness gauge [A] to determine pisto ...