If the fuel level indicator light (1) does not function properly, check the fuel level gauge and its lead wire/ coupler.
If the fuel level gauge and its lead wire/coupler are functioning properly, replace the combination meter with a new one.

Engine coolant temperature indicator light inspection
Fuel level gauge inspectionSide-stand removal and installation
Removal
Support the motorcycle with a jack or wooden block.
Caution
do not support the motorcycle with the exhaust pipes.
Make sure that the motorcycle is supported securely.
Remove the side-stand as shown in the side-stand construction.
Refer to ...
DTC “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 ...
Riding on hills
When climbing steep hills, the
motorcycle may begin to slow
down and show lack of power.
At this point you should shift to
a lower gear so that the engine
will again be operating in its
normal power range. Shift rapidly
to prevent the motorcycle
from losing momentum.
When ...