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

Water Pump Impeller Disassembly/Assembly
Water Pump Housing DisassemblySubthrottle Valve Actuator Input Voltage Inspection
NOTE
Be sure the battery is fully charged.
Turn the ignition switch to OFF.
Disconnect the subthrottle valve actuator connector and
connect the measuring adapter [A] between these connectors
as shown in the figure.
Main Harness [B]
Subthrottle Valve Actuator [C]
Special Tool ...
Payload and Tire Pressure
Failure to maintain proper inflation
pressures or observe payload limits for
your tires may adversely affect handling
and performance of yourmotorcycle
and can result in loss of control. The
maximum recommended load in addition
to vehicle weight is 180 kg (397 lb),
including rider, passenger, ...
Fuel Pressure Inspection
NOTE
Be sure the battery is fully charged.
Remove:
Fuel Tank Covers (see Fuel Tank Removal)
Fuel Tank Bolts (see Fuel Tank Removal)
Primary Fuel Hose (see Fuel Hose Replacement in the
Periodic Maintenance chapter)
Be sure to place a piece of cloth around the fuel outlet
pipe of the ...