Yamaha FZ1-N 2007 Service Manual page 344

Manuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keys
EAS26980
CHECKING THE INJECTORS
1. Check:
• Injectors
Damage → Replace.
EAS26990
CHECKING THE THROTTLE BODIES
1. Check:
• Throttle bodies
Cracks/damage → Replace the throttle
bodies as a set.
2. Check:
• Fuel passages
Obstructions → Clean.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
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.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS5D01029
CHECKING THE FUEL PRESSURE
1. Check:
• Fuel pressure
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Remove the rider and passenger seat.
Refer to "GENERAL CHASSIS" on page 4-
1.
b. Disconnect the fuel hose (fuel tank to pri-
mary injector fuel rail) "1" from the primary
injector fuel rail.
EWA5D01002
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.
email: info@motomatrix.co.uk
THROTTLE BODIES
c. Connect the pressure gauge "2" and
adapter "3" to the fuel hose (fuel tank to pri-
mary injector fuel rail).
Vacuum/pressure pump gauge
set
90890-06756
Pressure gauge
90890-03153
YU-03153
Fuel pressure adapter
90890-03176
YM-03176
d. Start the engine.
e. Measure the fuel pressure.
Fuel pressure
324 kPa (46.1 psi) (3.24 kg/
2
cm )
Faulty → Replace the fuel pump.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS27020
ADJUSTING THE THROTTLE POSITION
SENSOR
NOTE:
Before adjusting the throttle position sensor,
the engine idling speed should be properly
adjusted.
7-7