Yamaha FJR13AEV(C) Service Manual page 459

EAS26980
CHECKING THE INJECTORS
1. Check:
• Injectors
Damage → Replace.
EAS26990
CHECKING THE THROTTLE BODIES
1. Check:
• Throttle bodies
Cracks/damage → Replace the throttle bod-
ies as a set.
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 compressed
air.
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ET3P61044
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 rail
"2".
EW3P61012
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.
1
c. Connect the fuel pressure adapter "3" be-
tween the fuel hose "1" and fuel rail "2".
d. Connect the pressure gauge "4" to fuel pres-
sure adapter "3".
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2
7-8
THROTTLE BODIES
Pressure gauge
90890-03153
YU-03153
Fuel pressure adapter
90890-03176
YM-03176
1
e. Start the engine.
f. Measure the fuel pressure.
Output pressure
324.0 kPa (47.0 psi) (3.24
kgf/cm²)
Faulty → Replace the fuel pump.
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EAS27030
ADJUSTING THE THROTTLE POSITION
SENSOR
NOTE:
Before adjusting the throttle position sensor, the
engine idling speed should be properly adjusted.
1. Check:
• Throttle position sensor
Refer to "CHECKING THE THROTTLE PO-
SITION SENSOR" on page 8-232.
2. Adjust:
• Throttle position sensor angle
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a. Connect the throttle position sensor coupler
to the throttle position sensor.
b. Connect the digital circuit tester to the throttle
position sensor.
• Positive tester probe →
yellow "1"
• Negative tester probe →
black/blue "2"
4
3
2
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