Yamaha 2004 FZ6-SS Service Manual - page 365
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THROTTLE BODIES
FI
CHECKING THE FUEL PUMP AND
PRESSURE REGULATOR OPERATION
1. Check:
Sfuel pump operation
Refer to “FUEL TANK” in chapter 3.
a. Remove the seat fuel tank.
Refer to “SEAT AND FUEL TANK” in chapter
3.
b. Connect the pressure gauge
1
and adapter
2
onto the fuel injection pipe.
Pressure gauge
90890-03153, YU-03153
Adapter
90890-03176, YM-03176
c. Install the fuel tank.
Refer to “FUEL TANK” in chapter 3.
d. Start the engine.
e. Measure the fuel pressure.
Fuel pressure
250 kPa (2.5 kg / cm
2
, 36.3 psi)
Faulty
! Replace the fuel pump assembly.