Page 960 - 2006 HARLEY FLSTCI SERVICE MANUAL

the gravity-operated trap door blocks the inlet port of the
On carbureted models, when the engine is running, the
emanating from the carburetor throat from escaping into
air cleaner backplate. This prevents hydrocarbon vapors
vacuum created in the inlet pulls the gravity-operated
4.14 3 4-35 2006 Softail: Fuel System
On carbureted models, when the engine is not running,
EVAPORATIVE EMISSIONS CONTROL: CA MODELS
trap door open allowing air to enter. On carbureted models, the long, nylon canister-to-air cleaner hose (canister clean air inlet hose) supplies the canister with fresh air from the air cleaner. 1WARNING 1WARNING Keep evaporative emissions vent lines away from exhaust and engine. Gasoline is extremely flammable and highly explosive, which could result in death or seri- NOTE The EVAP system has been designed to operate with a mini- mum of maintenance. Check that all hoses are properly con- nected, are not pinched or kinked and are routed properly. Improper connections could leak charcoal from canister. 4 5 6

the atmosphere. ous injury. (00266a)

● ● ● 7 Figure 4-28. Schematic-CA Evaporative Emissions Control System (EFI models)
vehicle is tipped at an abnormal angle, the vapor valve
Hydrocarbon vapors in the fuel tank are directed through
the vapor valve and stored in the charcoal canister. If the
negative pressure (vacuum) slowly draws off the hydro-
carbon vapors from the charcoal canister through the
closes to prevent liquid gasoline from leaking out of the
On all models, when the engine is running, intake venturi
are equipped with an evaporative (EVAP) emissions control
system. The EVAP system prevents fuel hydrocarbon vapors
Harley-Davidson motorcycles sold in the state of California
These vapors pass through the intake and are burned as part of normal 2 1
the California Air Resource Board (CARB) regulations in
from escaping into the atmosphere and is designed to meet

GENERAL effect at the time of manufacture. The EVAP functions in the following manner: fuel tank through the vent hose. canister-to-intake purge hose. combustion in the engine. Throttle body Purge hose Fuel tank Vent hose Vapor valve Charcoal canister Elbow connector

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