This function indicates if "lap" function (lap number) is active.
When "lap" is not lit up, this means that the function has been switched off.
The "lap" function can be activated using the "lap" function of the setting menu.

Riding mode set indication
Riding style function (riding style change)Removal of the front brake master cylinder
Warning
The brake master cylinder manufacturer advises against servicing the
brake master cylinder due to the safety critical
nature of this component. Incorrect overhaul of these critical safety components
can endanger rider and passenger safety.
Maintenance operations on these units are l ...
Removal of the front brake system
Note
For the abs front braking system, also refer to sect. 7 - 5, Abs system
operating information, sect. 7 - 6, System
components, sect. 7 - 7, Abs components maintenance.
Undo the special screw (3), collect the sealing washers (4), and release the
front brake master cylinder assembly (1 ...
Reassembly of the control unit
Insert the control unit (4) into the protecting sheath (5) and position it on
the airbox.
Position the relay supporting bracket (2) by starting and tightening the
screws (1) to a torque of 6 nm +/- 10% (sect. 3 -
3, Frame torque settings), and connect the control unit connectors (3).
...