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 playCushion lever removal and installation
Removal
Remove the right side cowling and side frame covers. Refer to “exterior
parts removal and installation” in section 9d .
Support the motorcycle with a jack to relieve load on
the cushion levers.
Remove the left muffler and muffler chamber heat guard no. 2. Refer to
...
Engine coolant
Coolant level
The engine coolant solution
should be between "f" (full) and
"1..:' (Low) level lines on the engine
coolant reservoir. If the level is
lower than "1..:' (Low) level line,
bring it up to "f" (full) level by adding
50:50 mixture of distilled water ...
Special tools and equipment
Recommended service material
Note
required service material is also described in the following.
“Exhaust system components”
Special tool
...