The activation of this (amber yellow) "warning" indicates that the engine coolant temperature is high.
It is activated when the temperature reaches 121C (250f).
Note
In this case, stop the vehicle and switch the engine off immediately; make sure that the fans are working.

Low hands free key (hf) battery level
Steering release error - steering still lockedRemoval of the clutch-side crankcase cover
Unscrew the screws (2), (3) and (5) securing the clutch-side crankcase cover
(1).
Tap around the edge of the cover with a plastic mallet to detach it from the
crankcase half.
Remove the clutch cover (1) paying attention to the centring bushing (12).
Check the condition of the cent ...
Menu 2 on/off function
This function turns off and back on the menu 2.
If menu 2 is disabled, the functions for average fuel
consumption (cons.Avg), instantaneous fuel consumption
(cons.), Average speed (speed avg), trip time (trip time)
and air temperature (air) will no longer be displayed in the
"main screen ...
Refitting the number plate holder
Place the number plate light (5), as indicated, on the number plate holder
plate (8) and tighten the screws (7) to a torque
of 2 nm +/- 10% (sect. 3 - 3, Frame torque settings).
Thread the number plate light wiring (c) into the opening in the number plate
holder plate as shown.
Fit ...