Replace it if necessary.

Inner Tube Inspection
Spring Tension InspectionOil Pump Drive Gear Shaft Installation
Apply molybdenum disulfide grease [A] to the oil pump
drive gear shaft.
Apply molybdenum disulfide oil solution to the followings.
Transmission Case [B]
Crankcase [C]
Install the oil pump drive gear shaft and washer [D] as
shown in the figure.
Install the new circlip [E] into the ...
ECU Removal
NOTICE
Never drop the ECU especially on a hard surface.
Such a shock to the ECU can damage it.
Remove the upper air cleaner housing (see Air Cleaner
Element Replacement in the Periodic Maintenance chapter).
Lift up the ECU [A] with rubber protector [B] to disconnect
the connectors [C]. ...
Mud Guard Installation
Installation is the reverse of removal. Note the following.
Run the hose and lead correctly (see Cable, Wire, and
Hose Routing section in the Appendix chapter).
Check the brake line.
Apply a non-permanent locking agent to the threads of
the mud guard mounting bolts [A, B], and tighten them ...