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 lockedLcd unit functions
Speedometer.
Gives road speed
Rev counter.
Indicates engine revs per minute.
Clock.
Water temperature indicator.
Indicates engine coolant temperature.
Important
Stop riding if the temperature reaches the maximum value, otherwise the
engine might be damaged.
...
Changing the engine oil and filter cartridge
Note
This operation has to be carried out with hot engine (but turned off)
because the oil in these conditions is more fluid and
its evacuation is faster and complete.
Remove the drain plug (3) with seal (a) from the oil sump and allow the oil
to drain off.
Warning
Dispose of oil and/or fil ...
Reassembling the water radiator unit
The procedure is the same for both radiators.
Check the presence of clips (1) at the positions of the external coolant
radiator cover (23).
If removed, fit the front turn indicator (32) on the cover (23) and tighten the
screws (27) to 2 nm +/- 10% (sect. 3 - 3,
Frame torque settings).
No ...