If they appear damaged or deteriorated, replace them.

Balancer Adjustment
Torque LimiterBrake Pedal Installation
Apply grease to the brake pedal pivot shaft [A].
Install:
Washers [B]
Brake Pedal [C]
Apply a non-permanent locking agent to the threads of
the brake pedal mounting bolt [D], and tighten it.
Torque - Brake Pedal Mounting Bolt: 8.8 N·m (0.90 kgf·m,
78 in·lb)
Install the re ...
Exploded View
11. ZX1000JD/KD
AD: Apply adhesive.
AL: Tighten the two clamp bolts alternately two times to ensure even tightening
torque.
G: Apply grease.
L: Apply a non-permanent locking agent.
Specifications
...
Safe riding technique
The points given below are applicable for everyday motorcycle use and
should
be carefully observed for safe and effective vehicle operation.
For safety, eye protection and a
helmet are strongly recommended.
You should be aware of and verify
the applicable safety regulations in
force prior ...