Buell 2007 FIREBOLT Service Manual page 469

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EVAPORATIVE EMISSIONS CONTROL-CA MODELS
GENERAL
Buell motorcycles sold in the state of California are equipped
with an evaporative (EVAP) emissions control system. The
EVAP system prevents fuel hydrocarbon vapors from escap-
ing into the atmosphere and is designed to meet the Califor-
nia Air Resource Board (CARB) regulations in effect at the
time of manufacture.
The EVAP functions in the following manner:
Hydrocarbon vapors in the fuel tank are directed through
the vent valve and stored in the carbon canister. If the
vehicle is tipped at an abnormal angle, the vent valve
closes to prevent liquid gasoline from leaking out of the
fuel tank through the fuel tank vent hose.
When the engine is running, manifold venturi negative
pressure (vacuum) slowly draws off the hydrocarbon
vapors from the carbon canister through the canister
vent hose. These vapors pass through the throttle body
manifold and are burned as part of normal combustion in
the engine.
TROUBLESHOOTING
1 1
WARNING WARNING
Keep evaporative emissions vent lines away from
exhaust and engine. Gasoline is extremely flammable
and highly explosive, which could result in death or seri-
ous injury. (00266a)
The system has been designed to operate with a minimum of
maintenance. Check that all hoses are properly routed and
connected and are not pinched or kinked.
4-128 2007 Buell Firebolt: Fuel System
8817a
1
1. Canister
2. Fuel tank vent hose (to fuel tank vent valve)
3. Canister vent hose (to intake manifold)
Figure 4-117. Carbon Canister Installation.
REMOVAL
Vent Valve
1. Remove vent valve. See
2. If necessary, label fuel tank vent hose at canister fitting
and remove.
Canister
1. Remove upper tail body work. See
TAIL ASSEMBLY AND BODY
2. See Figure 4-117. The canister assembly mounts behind
the battery in the tail section.
3. Label and disconnect the fuel tank vent hose (2) and
canister vent hose (3) from the canister.
4. See Figure 4-119. Remove rear shock absorber reser-
voir fasteners (2). Move reservoir assembly away from
canister.
5. Slide canister towards left side of vehicle to disengage
from mounting plate (1).
4.45
2
3
4.40 FUEL TANK VENT VALVE.
2.36 SUBFRAME
WORK.