Kawasaki J300 - Service manual > Throttle Body Assy

Idle Speed Inspection

• Refer to the Idle Speed Inspection in the Periodic Maintenance chapter.

Throttle Bore Cleaning

• Check the throttle bore for cleanliness as follows.
  • Remove the throttle body assy (see Throttle Body Assy Removal).
  • Check the throttle valve [A] and throttle bore [B] for carbon deposit by opening the throttle valve.

  If any carbon accumulates, wipe the carbon off the throttle bore around the throttle bore and the throttle valve, using a cotton pad penetrated with a high flash-point solvent.

Throttle Body Assy Removal

WARNING Gasoline is extremely flammable and can be explosive under certain conditions, creating the potential for serious burns. Make sure the area is well ventilated and free from any source of flame or sparks; this includes any appliance with a pilot light. Do not smoke. Turn the ignition switch off. Disconnect the battery (-) terminal. To avoid fuel spills, draw it from the tank when the engine is cold. Be prepared for fuel spillage; any spilled fuel must be completely wiped up immediately.

• Remove:
  Storage Box (see Storage Box Removal in the Frame chapter)
  Air Cleaner Box (see Air Cleaner Box Removal)
• Loosen the throttle cable by the adjuster on the throttle grip side (see Throttle Control System Inspection in the Periodic Maintenance chapter).
• Loosen the locknuts [A].
• Remove the throttle cable lower ends [B] from the throttle pulley.

• Disconnect:
  Throttle Sensor Connector [A]
  Idle Speed Control Valve Actuator Connector [B]
  Intake Air Pressure Sensor Connector [C]
• Loosen the clamp screw [D].
• Remove the throttle body assy [E].
• After removing the throttle body assy, stuff pieces of lint-free, clean cloths into the throttle body assy holders.

NOTICE If dirt gets into the engine, excessive engine wear and possible engine damage will occur.

Throttle Body Assy Installation

• Installation is the reverse of the removal.
• Install the throttle body assy so that the rib [A] of the throttle body assy fits the groove [B] of the intake manifold.
• Reset the throttle sensor position and idle speed control valve actuator position (see How to Reset Throttle Sensor Position and Idle Speed Control Valve Actuator Position).

Throttle Body Assy Disassembly

• Remove the throttle body assy (see Throttle Body Assy Removal).
• Remove:
  Idle Speed Control Valve Actuator (see Idle Speed Control Valve Actuator Removal)
  Intake Air Pressure Sensor (see Intake Air Pressure Sensor Removal)

See also: