If they appear damaged or deteriorated, replace them.

Balancer Adjustment
Torque LimiterFront Fender Removal
Remove:
Bolts [A] with Washers (Both Sides)
Reflectors (Both Sides, US, CA, CAL and AU Models)
Front Fender [B]
Take the brake hose off the clamp [C] (both sides).
Front Fender Installation
Apply a non-permanent locking agent to the front fender
mounting bolts.
Tighten:
...
Spring Tension Inspection
Since a spring becomes shorter as it weakens, check its
free length [A] to determine its condition.
If the spring of either fork leg is shorter than the service
limit, it must be replaced. If the length of a replacement
spring and that of the remaining spring vary greatly, the
remaining s ...
What Are The Dealership’s Responsibilities?
Your Kawasaki dealer offers a wide range of services, parts, accessories, and
information on your product and on Kawasaki.
Each dealer is independently owned and operated and is responsible for the
dealership’s
operations, its repair, warranty, and service work, and its personnel.
Your dea ...