If they appear damaged or deteriorated, replace them.

Balancer Adjustment
Torque LimiterClutch Removal
Remove:
Clutch Cover (see Clutch Cover Removal)
Clutch Spring Bolts [A]
Clutch Springs (with Clutch Spring Holders)
Clutch Spring Plate [B]
Pusher [C]
Remove:
Friction Plates (10) [A]
Steel Plates (9) [B]
Spring [C]
Spring Seat [D]
Hold the sub clutch hub [A] ...
Air Intake Solenoid Valve Unit Test
Remove the air intake solenoid valve (see Air Intake Solenoid
Valve Removal in the Fuel System (DFI) chapter).
Set the hand tester [A] to the × 1 Ω range and connect it
to the air intake solenoid valve terminals as shown in the
figure.
Special Tool - Hand Tester: 57001-1394
...
Windshield and Other Plastic Parts
After washing use a soft cloth to
gently dry plastic parts. When dry,
treat the windshield, headlight lens,
and other nonpainted plastic parts with
an approved plastic cleaner/polisher
product.
NOTICE
Plastic parts may deteriorate
and break if they come in contact
with chemical substances
...