Evaporative Emissions Control (Ca Models) - Buell 2009 XB Series Service Manual

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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 escaping
into the atmosphere and is designed to meet the California 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 mani-
fold and are burned as part of normal combustion in the
engine.
TROUBLESHOOTING
Keep evaporative emissions vent lines away from exhaust
and engine. Gasoline is extremely flammable and highly
explosive, which could result in death or serious 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.
REMOVAL: FIREBOLT
Vent Valve
1. Remove fuel tank vent valve. See
VALVE.
2. See Figure 4-53. If necessary, label fuel tank vent hose
(2) at canister fitting and remove.
Canister
1. Remove upper tail body work. See
ASSEMBLY AND BODY WORK:
2. See Figure 4-53. The canister (1) mounts behind the bat-
tery 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 4-54. Remove rear shock absorber reservoir
fasteners (2). Move reservoir assembly away from canister.
5. Slide canister towards left side of vehicle to disengage
from mounting plate (1).
4-42 2009 XB Service: Fuel System
REMOVAL: LIGHTNING/ULYSSES
Vent Valve
1.
2.
Canister
1.
2.
INSTALLATION: FIREBOLT
4.12 FUEL TANK VENT
Vent Valve
Keep vent and vapor valve lines away from exhaust and
engine. Gasoline is extremely flammable and highly
explosive, which could result in death or serious injury.
2.39 SUBFRAME TAIL
(00263a)
FIREBOLT.
1.
2.
Canister
In next step, be sure canister hose barbs are facing left side
of vehicle and barb holes are facing toward front of vehicle.
1.
sm00903
1
2
1. Canister
2. Fuel tank vent hose (to fuel tank vent valve)
3. Canister vent hose (to intake manifold)
Figure 4-53. Carbon Canister
Remove vent valve. See 4.12 FUEL TANK VENT
If necessary, label fuel tank vent hose at canister fitting
and remove.
See Figure 4-58. Label and disconnect the fuel tank vent
hose (2) and canister vent hose (3) from the canister.
Slide canister towards rear of vehicle to disengage from
mounting plate.
Install fuel tank vent valve. See
VALVE.
See Figure 4-54. Attach fuel tank vent hose (2) to canister
if disconnected.
NOTE
See Figure 4-54. Slide canister into position on canister
mounting plate (1).
4.19
3
VALVE.
4.12 FUEL TANK VENT