Honda CRF125F 2020 Owner's Manual page 166

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: (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.
156
Technical Information
AMONG THOSE ACTS PRESUMED TO
CONSTITUTE TAMPERING ARE THE
ACTS LISTED BELOW:
• Removal of, or puncturing the muffler,
baffles, header pipes, or any other component
which conducts exhaust gases.
• Removal of, or puncturing of any part of the
intake system.
• Lack of proper maintenance.
• Removing or disabling any emissions
compliance component, or replacing any
compliance component with a non-compliant
component.