If they appear damaged or deteriorated, replace them.

Balancer Adjustment
Torque LimiterCheck 2-1: Speedometer Inspection
Using the suitable stand, raise the rear wheel off the
ground.
Rotate the rear wheel by hand or start the engine.
Check that the display changes speedometer.
If the display function does not work, check the following
parts.
Rear Wheel Rotation Sensor (see Wheel Rotation Sensor
Inspe ...
Crankshaft Sensor Peak Voltage Inspection
NOTE
Be sure the battery is fully charged.
Using the peak voltage adapter [A] is more reliable way
to determine the condition of the crankshaft sensor than
crankshaft sensor internal resistance measurements.
Disconnect the crankshaft sensor lead connector (see
Crankshaft Sensor ...
Leather, Vinyl, and Rubber
If your motorcycle has leather accessories,
special care must be taken.
Use a leather cleaner/treatment to
clean and care for leather accessories.
Washing leather parts with detergent
and water will damage them, shortening
their life.
Vinyl parts should be washed with the
rest of themo ...