Replace it if necessary.

Inner Tube Inspection
Spring Tension InspectionSpark Plug Condition Inspection
Remove the spark plugs (see Spark Plug Replacement in
the Periodic Maintenance chapter).
Visually inspect the spark plugs.
If the spark plug center electrode [A] and/or side electrode
[B] are corroded or damaged, or if the insulator [C]
is cracked, replace the plug.
If the spark plug is ...
Air Switching Valve
Air Switching Valve Operation Test
Refer to the Air Suction System Damage Inspection in the
Periodic Maintenance chapter.
Air Switching Valve Unit Test
Remove the air switching valve (see Air Switching Valve
Removal in the Engine Top End chapter).
Set the hand tester [A] to the × 1 ...
Starting the Engine
Check that the engine stop switch is
in the
position.
A. Engine Stop Switch
B. Starter Button
Turn the ignition key to “ON”.
Make sure the transmission is in neutral.
A. Neutral Indicator Light
B. Ignition Switch
C. “ON” position
NOTE
The motorcycle is equipped w ...