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 playDTC “c91” (p0500): vehicle speed sensor
circuit malfunction
Detected condition and possible cause
Detected condition
Possible cause
Speedometer does not receive signal from the vehicle
speed sensor for more than 6 sec. When the motorcycle is
running. Ecm does not receive signal from the vehicle
speed sensor for more than ...
Oil cooler / oil cooler hose removal and
installation
Refer to “electrical components location” in section 0a .
Removal
Turn the ignition switch off.
Remove the left side cowling. Refer to “exterior parts removal and
installation” in section 9d .
Drain engine oil. Refer to “engine oil and filter replacement” in
section 0b .
...
Precautions
Keep away from fire or spark.
During disassembling, use care to minimize spillage of
gasoline.
Spilled gasoline should be wiped off immediately.
Work in a well-ventilated area.
For e-33 models, drain fuel from the fuel tank before
...