Honda VTX1800R Owner's Manual page 199

Emission Control Systems
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 2
device or element of design has been
removed or rendered inoperative by any
person.
190
Technical Information
1
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.