Honda VTX1300C VTX 2004 Owner's Manual page 196

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 absorbed 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
through the carburetor.
Emission Control Systems
Problems That May Affect Motorcycle
Exhaust Emissions
If you are aware of any of the following
symptoms, have the vehicle inspected and
repaired by your authorized Honda
motorcycle dealer.
Symptoms:
1. Hard starting or stalling after starting
2. Rough idle
3. Misfiring or backfiring during
acceleration
4. After-burning (backfiring)
5. Poor performance (driveability) and
poor fuel economy
Technical Information
187