Checking The Pressure Regulator; Checking The Fuel Pump And Pressure Regulator Operation - Yamaha YZF-R1P Service Manual

THROTTLE BODIES

CHECKING THE PRESSURE REGULATOR

1. Check:
• pressure regulator
Damage → Replace.
CHECKING THE FUEL PUMP AND
PRESSURE REGULATOR OPERATION
1. Check:
• pressure regulator operation
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a. Remove the fuel tank.
Refer to "SEATS" and "FUEL TANK" in
chapter 3.
b. Disconnect the negative pressure hose 1
from the pressure regulator at the joint.
c. Connect the mity vac 2 onto the negative
pressure hose from the pressure regulator.
d. Connect the pressure gauge 3 and adapter
4 onto the fuel injection pipe.
Mity vac
YB-35956
Pressure gauge
YU-03153
Adapter
YM-03176
e. Install the fuel tank.
Refer to "SEATS" and "FUEL TANK" in
chapter 3.
f. Start the engine.
g. Measure the fuel pressure.
Fuel pressure
284 kPa (2.84 kg/cm
h. Use the vacuum pressure pump gauge set
to adjust the fuel pressure in relation to the
vacuum pressure as described below.
NOTE:
The vacuum pressure should not exceed
100 kPa (760 mmHg, 29.9 inHg).
7 - 34
FI
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2
, 40.4 psi)