Buell XB9R 2003, Service Manual, Page: 329 / 566

4-32 2003 Buell XB9R: Fuel System
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7. See Figure 4-137. Attach fuel pump connector [86] to
main wiring harness.
8. See Figure 4-140. Pressurize the fuel system.
a. Start and idle engine to pressurize the fuel system.
b. Open fuel valve (2) on fuel pressure gauge to allow
fuel to flow down the gauge hose.
c. Position the air bleed tube (3) into proper container.
d. Open and close the air bleed petcock (5) to purge
the fuel pressure gauge and hose of air. Repeat this
step several times until only solid fuel (without bub-
bles) flows from the air bleed tube.
e. Close the air bleed petcock.
9. Open throttle and increase engine speed to 2500-3000
RPM. Note the reading on the pressure gauge.
a. If pressure is 49-51 PSI (338-352 kPa) then system
is operating within limits.
b. If pressure is not within limits, see Test 4.13 (Part 1
of 2) flow chart after disconnecting pressure gauge.
1
WARNING
1
WARNING
A small amount of gasoline will drain from the valve
when the valve is removed. Thoroughly wipe up any spilt
fuel immediately. Dispose of rags in a suitable manner.
Gasoline is extremely flammable and highly explosive.
Inadequate safety precautions could result in death or
serious injury.
10. See Figure 4-140. Turn engine off. Detach pressure
gauge (4) from adapter (1).
a. Open the air bleed petcock (5) to relieve fuel system
pressure and purge the pressure gauge of gasoline.
b. Remove pressure gauge from adapter.
11. Detach adapter from vehicle.
12. Connect fuel line to throttle body inlet.
DIAGNOSTICS
Diagnostic Notes
The reference numbers below correlate with the circled num-
bers on the Test 4.13 flow charts.
1. Use HARNESS CONNECTOR TEST KIT (Part No. HD-
41404), gray socket probe and patch cord.
2. Connect BREAKOUT BOX (Part No. HD-42682) to ECM.
See
4.6 BREAKOUT BOX .
Figure 4-139. Fuel Pressure Gauge Adapter
Figure 4-140. Fuel Pressure Gauge (Part No. HD-41182)
1. Throttle body inlet
2. Fuel pressure gauge adapter
3. Fuel line
b1044x4x
1
3
2
10
30
20
50
40
250
60 70
80
90
100
400
350
300
250
20
0
1
5
0
1
0
0
450
50
0
55
0
6
00
6
5
0
4
b1045x4x
1. Fuel pressure gauge adapter (B-45522)
2. Fuel valve (closed position)
3. Air bleed tube
4. Fuel pressure gauge (HD-41182)
5. Air bleed petcock
2
1
5
3