Honda GL1800 2004 Owner's Manual page 219

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
Noise Emission Control System
TAMPERING WITH THE NOISE CONTROL SYSTEM IS PROHIBITED:
U. S. federal law prohibits, or Canadian provincial laws may prohibit the
following acts or the causing thereof: ( ) The removal or rendering inoperative
by any person, other than for purposes of maintenance, repair or replacement, of
any device or element of design incorporated into any new vehicle for the
purpose of noise control prior to its sale or delivery to the ultimate purchaser or
while it is in use; or ( ) the use of the vehicle after such device or element of
design has been removed or rendered inoperative by any person.
AMONG THOSE ACTS PRESUMED TO CONSTITUTE TAMPERING ARE
THE FOLLOWING ACTS:
1. Removal of, or puncturing the muffler, baffles, header pipes or any other
component which conducts exhaust gases.
2. Removal of, or puncturing of any part of the intake system.
3. Lack of proper maintenance.
4. Replacing any moving parts of the vehicle, or parts of the exhaust or intake
system, with parts other than those specified by the manufacturer.
212
Technical Information
1
2