From the owners manual.
1. Engine stop switch
Engine Stop Switch
In addition to the ignition switch being turned
to the ON position, the engine stop switch
must be in the RUN position for the
motorcycle to operate.
The engine stop switch is for emergency use.
If an emergency arises which requires the
engine to be stopped, move the engine stop
switch to the STOP position.
Note:
• Although the engine stop switch
stops the engine, it does not turn off
all the electrical circuits and may
cause difficulty in restarting the
engine due to a discharged battery.
Ordinarily, only the ignition switch
should be used to stop the engine.