Buell P3, Service Manual

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2007 Buell P3: Fuel System 4-27
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Vent Tube
See Figure 4-26. The vent tube, which is cable strapped to
the nozzle of the vent tube fitting at the front of the fuel cap
flange, runs downward on the left side of the fuel tank and
turns rearward passing through a cable strap loosely installed
around the front of the frame backbone (the first of three
equally spaced cable straps moving front to rear). From this
point, the vent tube follows the main harness through a large
hole in the front engine mounting bracket (just rear of the two
lateral holes described earlier). Continuing rearward, the tube
follows the bottom left side of the frame backbone running
inboard of the crankcase breather hose. Moving outboard of
the breather hose just in front of the ignition coil, the tube fol-
lows the ignition module conduit down the left side of the
frame backbone and passes through the loop formed by the
hose connected to the oil drain/return fitting. The tube enters
an opening at the front of the passenger foot peg support
where it is runs rearward to connect to the upper fitting at the
back of the charcoal canister. One cable strap is used to con-
nect the “carb” and “tank” vent tubes together at the back of
the canister, while another secures both tubes to the PCV
outlet hose at the front of the canister.
NOTE
On non-California models, the end of the “tank” vent tube gets
routed through the slot at the front of the tail section and then
into the cavity on the inboard side of the battery box (along-
side the transmission vent hose), while the “carb” vent tube
(purge tube) is absent.
Purge Tube
The purge tube is connected to a fitting on the inboard side of
the carburetor, where it passes to the right side of the vehicle
just behind the ignition coil. From this point, the tube runs
rearward following the same path as the hose to charcoal
canister (front fitting), except that it is connected to the lower
fitting at the back of the canister.
Figure 4-26. Hose Routing (Left Side View)
a0197x4x
1. Vent tube
2. Cable straps (1&2)
3. PCV valve
4. Frame backbone
5. Ignition coil
6. Purge tube
7. Ignition module connector
8. Loop oil drain/return fitting/hose
9. Vent tube (non-California models)
10. Transmission vent hose
11. Charcoal canister
12. Oil drain hose
13. Breather drain hose
14. Air box
15. Charcoal canister hose
16. Breather hose
11
8
10
6
4
3
1
12
13
14
15
16
2
5
7
9