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7-32
THROTTLE BODIES
FI
NOTE:
CHECKING THE PRESSURE REGULATOR
1. Check:
Spressure regulator
Damage ! Replace.
CHECKING THE FUEL PUMP AND PRES-
SURE REGULATOR OPERATION
1. Check:
Spressure regulator operation
a. Remove the fuel tank.
Refer to “FUEL TANK” in chapter 3.
b. Disconnect the negative pressure hose
1
from the pressure regulator at the joint.
c. Connect the vacuum/pressure pump gauge
set
2
onto the negative pressure hose from
the pressure regulator.
d. Connect the pressure gauge
3
and adapter
4
onto the fuel injection pipe.
Vacuum/pressure pump gauge set
90890-06756, YB-35956
Pressure gauge
90890-03153, YU-03153
Adapter
90890-03176, YM-03176
e. Install the fuel tank.
Refer to “FUEL TANK” in chapter 3.
f. Start the engine.
g. Measure the fuel pressure.
Fuel pressure
284 kPa (2.84 kg/cm
2
, 40.4 psi)
h. Use the vacuum pressure pump gauge set to
adjust the fuel pressure in relation to the vac-
uum pressure as described below.
The vacuum pressure should not exceed 100
kPa (760 mmHg, 29.9 inHg).