If the surface is corroded or if the blades are damaged, replace the impeller

Water Pump Impeller Disassembly/Assembly
Water Pump Housing DisassemblyHeadlight Aiming Adjustment
NOTE
Do not turn the bolts [A] because the reflector in the
headlight comes off.
(In the photo, the headlight unit has been removed for
clarity.)
NOTE
The left adjuster [A] and right adjuster [B] can move the
direction of the headlight beam to up, down, left and
right by turning each a ...
Daily Checks
Check the following items each day before you ride. The time required is
minimal,
and habitual performance of these checks will help ensure you a safe, reliable
ride.
If any irregularities are found during these checks, refer to the Maintenance
and
Adjustment chapter or see your dealer fo ...
Radiator Cap Inspection
Remove:
Radiator Cap (see Coolant Change in the Periodic Maintenance
chapter)
Check the condition of the bottom [A] and top [B] valve
seals and valve spring [C].
If any one of them shows visible damage, replace the cap
with a new one.
Install the cap [A] on a cooling system pr ...