Honda CRF70F 2004 Owner's Manual page 146

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: (1) 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 (2) the use of the vehicle after such
device or element of design has been removed
or rendered inoperative by any person.
Emission Control Systems
AMONG THOSE ACTS PRESUMED TO
CONSTITUTE TAMPERING ARE THE
ACTS LISTED BELOW:
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.
Technical Information
137