If any is worn down to the service limit, replace the brush assy.
Starter Motor Brush Length [B] Standard: 12.05 mm (0.4744 in.) Service Limit: 6.55 mm (0.258 in.)

Starter Motor Assembly
Commutator Cleaning and InspectionTechnical Information-Power Mode
The rider can choose from three engine power modes to suit their preferences
and road conditions.
The FI ECU controls the engine power by adjusting fuel injection, air intake,
and ignition timing. It
enables three-mode selection: Full Power (Mode F), Middle Power (Mode M), and
Low Power (M ...
Balancer Adjustment
Remove the left lower fairing (see Lower Fairing Removal
in the Frame chapter).
Start the engine and warm it up thoroughly.
Adjust the balancer gear backlash with the engine idling.
The amount of backlash can be changed by turning the
balancer shaft which has eccentric journals.
St ...
Oil Pressure Measurement
Remove:
Right Lower Fairing (see Lower Fairing Removal in the
Frame chapter)
Oil Passage Plug [A]
Attach the adapter [A] and gauge [B] to the plug hole.
Special Tools - Oil Pressure Gauge, 10 kgf/cm²: 57001-164
Oil Pressure Gauge Adapter, PT3/8: 57001
-1233
...