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 playEngine assembly installation
Install the engine in the reverse order of engine removal.
Pay attention to the following points:
before installing the engine, install the collars (1).
Before installing the engine, install the engine
mounting thrust adjusters (2).
Gradually raise the rear side of ...
Special situations require special care
Of course, there are some times
when full-force braking is not the
correct technique. When the road
surface is wet, loose, or rough,
you should brake with care. When
you're leaned over in a corner,
avoid braking. Straighten up
before braking. Better yet, slow
down before entering the corner. ...
Left handlebar
Clutch lever 1
The clutch lever is used for disengaging
the drive to the rear wheel
when starting the engine or shifting
the transmission gear.
Squeezing the lever disengages
the clutch.
Headlight flasher switch 2
Press the switch to light the headlight.
Dimmer switch 3
" " ...