Buell 2003XB9S Service Manual page 427

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INTAKE LEAK TEST
1. Start engine.
2. Warm engine to operating temperature.
3. See Figure 4-107. Turn knob (5) counterclockwise to
open propane bottle (6).
1
DANGER
Propane is an extremely flammable liquid and vapor.
Vapor may cause flash fire. Keep away from heat, sparks
and flame. Keep container closed. Use only with ade-
quate ventilation.
NOTE
Do not direct propane stream toward front of engine. If pro-
pane enters air scoop a false reading will be obtained.
4. See Figure 4-108. Aim nozzle toward possible sources of
leak such as fuel injectors and intake tract.
5. See Figure 4-107. Push valve (4) to release propane.
Tone of engine will change when propane enters source
of leak.
4-118 2003 Buell XB9S: Fuel System
Figure 4-108. Checking for Intake Leak