Honda CRF1100 Owner's Manual page 226

Emergency Stop Signal
Emergency stop signal activates when the
system detects hard braking about 50 km/h
(31 mph) or above to alert drivers behind you
about sudden braking by rapidly flashing
both turn signal lights. This may help to alert
drivers behind you to take appropriate
means to avoid a possible collision with your
vehicle.
When the system activates:
220
Hard braking
Both turn signal indicators blink
The emergency stop signal stops operating
when:
You release the brake lever and pedal.
●
The ABS is deactivated.
●
Your vehicle's decelerating speed
●
becomes moderate.
You press the hazard switch.
●
Brakelight come on
Both turn signals flash