Exhaust Emission Control System; Crankcase Emission Control System - Honda 1999 Shadow Aero VT1100C3 Owner's Manual

Emission Control Systems
through the carburetor. Exhaust Emission Control System
The exhaust emission control system
consists of lean carburetor settings, and no
adjustment should be made except idle
speed adjustment with the throttle stop
screw.
Evaporative Emission Control System
(California only)
This motorcycle complies with the
requirements of the California Air
Resources Board (CARB) evaporative
emission regulations. Fuel vapor from the
fuel tank and carburetor is directed into
the charcoal canister and air cleaner where
it is adsorbed and stored while the engine
is stopped. When the engine is running
and the purge control diaphragm valve is
open, fuel vapor in the charcoal canister
and air cleaner is drawn into the engine
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Technical Information
Crankcase Emission Control System
The engine is equipped with a closed
crankcase system to prevent discharging
crankcase emissions into the atmosphere.
Blow-by gas is returned to the combustion
chamber through the air cleaner and the
carburetor.