Kawasaki J300 - Service manual > Air Cleaner Element Replacement
- In dusty areas, the element should be replaced more frequently than the recommended interval.
WARNING If dirt or dust is allowed to pass through into the throttle body assy, the throttle may become stuck, possibly causing accident. Replace the air cleaner element according to the maintenance chart.
NOTICE If dirt gets through into the engine, excessive engine wear and possibly engine damage will occur.
Air Cleaner Cover [B]
Air Cleaner Element [B]
- Install a new element and tighten its bolts.
NOTICE Use only the recommended air cleaner element. Using another air cleaner element will wear the engine prematurely or lower the engine performance.
- Install the air cleaner cover and tighten its screws.
Idle Speed Inspection
- Start the engine and warm it up thoroughly.
- With the engine idling, turn the handlebars to both sides [A].
If handlebars movement changes the idle speed, the throttle cables may be improperly adjusted or incorrectly routed, or damaged. Be sure to correct any of these conditions before riding (see Throttle Control System Inspection and Cable, Wire, and Hose Routing section in the Appendix chapter).
WARNING Operation with improperly adjusted, incorrectly routed or damaged cables could result in an unsafe riding condition. Follow the service manual to be make sure to correct any of these conditions.
- Check the idle speed.
If the idle speed is out of specified range, check the idle speed control valve actuator (see Idle Speed Control Valve Actuator Inspection in the Fuel System (DFI) chapter).
Standard: 1 600 +-100 r/min (rpm)
Idle Speed Adjustment
- This motorcycle is equipped with the idle speed control valve. The idle speed is adjusted automatically at the specified value (1 600 r/min (rpm) ) by the idle speed control valve system. Therefore, it is not necessary to adjust the idle speed normally.
Throttle Control System Inspection
- Check the throttle grip free play [A].
If the free play is incorrect, adjust the throttle cables.
Throttle Grip Free Play
Standard: 2 - 6 mm (0.08 - 0.24 in.)
- Check that the throttle grip [B] moves smoothly from full open to close,
and the throttle closes quickly and completely by the return spring in all
If the throttle grip does not return properly, check the throttle cables routing, grip free play, and cable damage. Then lubricate the throttle cable.
- Run the engine at the idle speed, and turn the handlebars all the way to
the right and left to ensure that the idle speed does not change.
If the idle speed increases, check the throttle cable free play and the cable routing.
If necessary, adjust the throttle cable as follows.
- Slide the dust cover [A].
- Loosen the locknut [A].
- Turn the adjuster [B] until the proper amount of throttle grip play is obtained.
- Tighten the locknut.
If the throttle grip free play cannot be adjusted with the adjuster of the throttle cable upper end, adjust the free play with the adjuster of the throttle cable lower end.
- Remove the storage box (see Storage Box Removal in the Frame chapter).
- Loosen the locknuts [A] and adjust the throttle cable so that the throttle grip free play is until the proper amount.
- Tighten the locknuts.
If the free play can not be adjusted with the adjuster, replace the cable.
Fuel Hose Inspection (fuel leak, damage, installation condition) If the motorcycle is not properly handled, the high pressure inside the fuel line can cause fuel to leak [A] or the hose to burst. Remove the fuel tank (see Fuel Tank Removal in the Fuel System (DFI) chapter) and check the fuel hoses.