Honda 2006 RC51 Owner's Manual page 219

Emission Control Systems
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
Classic Cycles Technical Resources