Honda ADV750 Owner's Manual page 144

Unlock the Ignition Switch in an Emergency
ID number input success
After the last ID number is inputted, through,
the ignition switch ring and Honda SMART
Key indicator will flash every 2 seconds until
the EM mode coupler is removed.
Be sure to remove the EM mode coupler and
return the blue dummy coupler.
The ignition switch is then unlocked. Reinstall
the parts in reverse order of removal and
turn the ignition switch to the (On) position
within 6 minutes. You can start the engine.
To lock the ignition switch, turn the ignition
switch to the SEAT FUEL,
position, and press and hold the ignition
switch for 2 seconds.
The ignition switch also locks automatically
when the ignition switch has been in the
SEAT FUEL, (Off), or
140
(Off), or (Lock)
(Lock) position for
about 6 minutes after the ID number is
successfully inputted.
When the ignition switch is locked, the
ignition switch ring goes off.
To unlock the ignition switch again, repeat
the procedure for unlocking the ignition
switch.