Yamaha BREEZE YFA1S Owner's Manual page 63

NOTE:
If the starter switch is pushed with the main
switch "ON" and the engine stop switch "OFF",
the starter motor will be activated but the engine
will not start. To start the engine, be sure to
position the engine stop switch at "RUN".
EBU12860
Light switch "LIGHTS"
Set the switch to the "LO" position to switch on
the low beam and the taillight.
Set the switch to the "HI" position to switch on
the high beam and the taillight.
Set the switch to the "OFF" position to switch off
all the lights.
NOTE:
The headlight and the taillight can be turned on
only when the engine is started.
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