If they show any damage, replace it.

Caliper Fluid Seal Damage
Caliper Piston and Cylinder DamageRadiator and Cooling Fan
Check the radiator fins for obstruction
by insects or mud. Clean off
any obstructions with a stream of
low-pressure water.
WARNINGThe cooling fan spins at high
speed and can cause serious
injuries. Keep your hands and
clothing away from the cooling
fan blades at all times.
...
Front Brake Pad Installation
Check that the pad spring [A] is in place on the caliper.
Push the caliper pistons in by hand as far as they will go.
Install the brake pads [A] on the pad spring correctly.
Fit the pad into the groove of the caliper as shown in the
figure.
Install the pad pins while pushing t ...
Kawasaki Intelligent anti-lock Brake System (KIBS,
For models equipped with KIBS)
KIBS regulates anti-lock braking performance
with more precision during
sports riding compared to a conventional
ABS system.
KIBS is designed to help prevent
the wheels from locking up when the
brakes are applied hard while riding
straight. KIBS automatically regulates
brake force using en ...