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 playIsc valve preset and opening initialization
When removing or replacing the isc valve, set the isc
valve to the following procedures:
turn the ignition switch on.
Set up the sds tool. (Refer to the sds operation
manual for further details.)
Click the “active control”.
Click the “isc learned value reset” (1) ...
Crankcase breather (pcv) hose / reed
valve / cover removal and installation
Removal
Lift and support the fuel tank with the prop stay.
Refer to “fuel tank removal and installation” in section 1g .
Remove the air cleaner box. Refer to “air cleaner box removal and
installation” in section 1d .
Disconnect the crankcase breather (pcv) hose (1).
...
Clutch lifter pin inspection and adjustment
Refer to “clutch removal” and “clutch installation” .
Note
when inspection and adjusting the clutch
lifter pin, it is not necessary to install the
clutch onto the countershaft.
Inspect and adjust the clutch lifter pin in the following
procedures:
assemble the ...