Installing The Fuel Pipe - Yamaha XV19SW Service Manual

Vacuum/pressure pump gauge
set
90890-06756
Pressure gauge
90890-03153
Fuel pressure adapter
90890-03176
YM-03176
2
5
2
f. Start the engine.
g. Measure the fuel pressure.
Fuel pressure
392 kPa (3.92 kg/cm², 55.7 psi)
h. Use the vacuum/pressure pump gauge set to
adjust the fuel pressure in relation to the vac-
uum pressure as described below.
NOTE:
The vacuum pressure should not exceed 100
kPa (760 mmHg).
• Increase the vacuum pressure →
Fuel pressure is decreased
• Decrease the vacuum pressure →
Fuel pressure is increased
Faulty → Replace the pressure regulator.
L LLL L LLL L L LLL L L LLL L
1
1
4
3
L LLL L L LLL L LLL
6-12
THROTTLE BODIES
EAS27030
ADJUSTING THE THROTTLE POSITION
SENSOR
1. Check:
• Throttle position sensor
Refer to "CHECKING THE THROTTLE PO-
SITION SENSOR" on page 7-89.
2. Adjust:
• Throttle position sensor angle
M MMM M MMM M M MMM M M MMM M
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 terminal "1"
• Negative tester probe
black terminal "2"
Digital circuit tester
90890-03174
Model 88 Multimeter with ta-
chometer
YU-A1927
c. Measure the throttle position sensor voltage.
d. Adjust the throttle position sensor angle so
that the voltage is within the specified range.
Output voltage (at idle)
0.63–0.73 V
e. After adjusting the throttle position sensor an-
gle, tighten the throttle position sensor
screws "3".
3
2
L LLL L LLL L L LLL L L LLL L
ET1D71008

INSTALLING THE FUEL PIPE

1. Install:
• Fuel pipe "1"
Fuel pipe bolt
30 Nm (3.0 m·kg, 22 ft·lb)
M MMM M M MMM M MMM
3
1
L LLL L L LLL L LLL