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 playRadiator reservoir tank inspection
Inspect the radiator reservoir tank in the following
procedures:
remove the right side cowling. Refer to “exterior parts removal and
installation” in section 9d .
Inspect the radiator reservoir tank (1) for leaks. If any
defects are found, replace the radiator reservoir tank
...
Dimmer / passing light switch inspection
Inspect the dimmer/passing light switch in the following
procedures:
remove the air cleaner box. Refer to “air cleaner box removal and
installation” in section 1d .
Disconnect the left handlebar switch coupler (1).
(Yellow)
Inspect the dimmer/passing light switch ...
Front brake master cylinder parts inspection
Refer to “front brake master cylinder / brake lever disassembly and assembly”
.
Master cylinder
Inspect the master cylinder bore for any scratches or
other damage
Piston / rubber parts
Inspect the piston surface for any scratches or other
damage.
Inspect the primary cup, secondary cup ...