The yellow light functions as the electronic steering damper warning indicator.
The light and warning symbol "ESD" go on if there is a malfunction in the electronic steering damper system.
However, this could also be caused by trouble with the charging system (e.g.
battery). If the warning light comes on, check the battery to be sure it is fully charged. If the battery is fully charged and the warning light still goes on, have the electronic steering damper system checked by an authorized Kawasaki dealer.
The electronic steering damper system maintains the last damping force setting if it fails.

A. Yellow Warning Indicator Light
B. Electronic Steering Damper Warning Symbol
KIBS Warning Indicator Light (For models equipped
with KIBS)
ABS Indicator Light (For models equipped with KIBS)Outline
When a problem occurs with DFI system, the warning indicator
light (LED) [A] and FI warning symbol [B] goes on
to alert the rider. In addition, the condition of the problem is
stored in the memory of the ECU. For models equipped with
an immobilizer system, the warning indicator light (LED)
and ...
Cooling System Flushing
Over a period of time, the cooling system accumulates
rust, scale, and lime in the water jacket and radiator. When
this accumulation is suspected or observed, flush the cooling
system. If this accumulation is not removed, it will clog
up the water passage and considerable reduce the efficiency
...
Balance Inspection
Remove the front and rear wheels (see Front/Rear Wheel
Removal).
Support the wheel so that it can be spun freely.
Spin the wheel lightly, and mark [A] the wheel at the top
when the wheel stops.
Repeat this procedure several times. If the wheel stops
of its own accord in various positi ...