Honda 2006 RC51 Owner's Manual page 218

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
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.
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