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

Water Pump Impeller Disassembly/Assembly
Water Pump Housing DisassemblySystem Components
1. FI ECU
The FI ECU analyzes the motorcycle conditions based
on the signals from the front/rear wheel rotation sensors
and FI sensors (such as the crankshaft sensor and main
throttle sensor), and controls engine power by reducing the
number of ignition and retarding the ignition timing. The
m ...
Stopping the engine
Close the throttle completely.
Shift the transmission into neutral
Turn the ignition key to “OFF�.
Support the motorcycle on a firm,
level surface with the side stand.
Lock the steering.
NOTE
The motorcycle is equipped with a
vehicle-down sensor, which causes
the engine to sto ...
Idle Speed Inspection
Start the engine and warm it up thoroughly.
With the engine idling, turn the handlebar to both sides
[A].
If handlebar movement changes the idle speed, the
throttle cables may be improperly adjusted or incorrectly
routed, or damaged. Be sure to correct any of these
conditions before rid ...