Checking The Primary Injectors; Checking The Throttle Bodies; Checking The Rollover Valve (For California Only); Checking The Fuel Pressure - Yamaha YZFR6X(C) 2008 Service Manual

EAS26980

CHECKING THE PRIMARY INJECTORS

1. Check:
• Injectors
Damage → Replace.
EAS26990

CHECKING THE THROTTLE BODIES

1. Check:
• Throttle bodies
Cracks/damage → Replace the throttle
body assembly.
ECA14600
CAUTION:
The throttle bodies should not be disas-
sembled.
2. Check:
• Fuel passages
Obstructions → Clean.
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a. Wash the throttle bodies in a petroleum-
based solvent.
Do not use any caustic carburetor cleaning
solution.
b. Blow out all of the passages with com-
pressed air.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
ET2C05001
CHECKING THE ROLLOVER VALVE (for
California only)
1. Check:
• Rollve valve "1"
Damage/faulty → Replace.
NOTE:
• Check that air flows smoothly only in the
direction of the arrow shown in the illustra-
tion.
• The rollover valve must be in an upright posi-
tion when checking the airflow.
THROTTLE BODIES
EAS27010

CHECKING THE FUEL PRESSURE

1. Check:
• Fuel pressure
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a. Remove the rider seat.
Refer to "GENERAL CHASSIS" on page 4-
1.
b. Disconnect the fuel hose "1" from the fuel
tank.
EW2C01008
WARNING
Cover fuel hose connections with a cloth
when disconnecting them. Residual pres-
sure in the fuel lines could cause fuel to
spurt out when removing the hoses.
c. Connect the pressure gauge "2" and
adapter "3" to the fuel hose "1".
Pressure gauge
90890-03153
Pressure gauge
YU-03153
Fuel pressure adapter
90890-03176
YM-03176
d. Start the engine.
e. Measure the fuel pressure.
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