28-955.01. Motorcycles; noise level equipment; unauthorized equipment
A. A person shall not operate or as an owner permit the operation of a motorcycle in this state that is not equipped with the manufacturer's original muffler or other original noise reduction equipment or with a replacement muffler or replacement noise reduction equipment capable of reducing the noise levels below the maximum operating noise levels established by the department pursuant to section 28-955.02.
B. A person shall not use a muffler cutout, bypass or similar device on a motorcycle operated in this state.