Adjust the engine idle speed periodically on the engine at normal operating temperature.
To adjust the idle speed:

Engine oil and filter change
Throtile cable playMuffler / muffler chamber / exhaust pipe
removal and installation
Removal
Loosen the muffler connecting bolts (1).
Remove the mufflers (2) by removing the mounting
bolt and nut (3).
Note
support the muffler to prevent it from falling.
Remove the side cowlings. Refer to “exterior parts
removal and installation” in secti ...
Horn inspection
Note
if the horn sound condition is normal, it is not
necessary to inspect the horn button
continuity.
Horn button inspection
Remove the air cleaner box. Refer to “air cleaner box removal and
installation” in section 1d .
Disconnect the left handlebar switch lead ...
Crankcase breather (pcv) hose inspection
Inspect the crankcase breather (pcv) hose in the
following procedures:
lift and support the fuel tank with the prop stay.
Refer to “fuel tank removal and installation” in section 1g .
Inspect the crankcase breather (pcv) hose (1) for
wear and damage.
If it is worn or damaged ...