Honda HSM1590i Manuel De L'utilisateur page 31

Fuel gauge
The fuel gauge indicates the amount of fuel in the tank. When the fuel
gauge needle enters the EMPTY range, refill the tank as soon as
possible.
FUEL GAUGE
EMPTY FULL
Headlight
The headlight turns on when the engine switch is in the ON position.
The battery may become discharged when the light is ON while the
engine is OFF.
If the headlight does not come on, the battery might be faulty or the
bulb might be blown. Check the battery.
HEADLIGHT
28