If they appear damaged or deteriorated, replace them.

Balancer Adjustment
Torque LimiterOdometer
The odometer shows the total distance
in kilometers or miles that the vehicle
has run. If the odometer is displayed,
the “ODO” is displayed on the
multifunction display. This meter cannot
be reset.
A. Odometer
B. “ODO”
NOTE
The data are maintained even if the
battery is disco ...
Check 3-6: Neutral Indicator Light (LED) Inspection
Connect the leads in the same circuit as Check 3-2.
Connect the terminal [8] to the battery (–) terminal.
Check that the neutral indicator light (LED) [A] goes on.
If the indicator light does not go on, replace the meter unit.
...
Crankcase Assembly
NOTICE
The upper and lower crankcase halves are machined
at the factory in the assembled state, so the
crankcase halves must be replaced as a set.
With a high flash-point solvent, clean off the mating surfaces
of the crankcase halves and wipe dry
WARNINGGasoline and low flash-poin ...