"Motorcycle noise rule inches ahead
PORTLAND — A proposal that would require all motorcycles parked or operated on public streets in Portland to bear a label certifying compliance with federal noise emission standards is inching its way to a City Council vote.
At their meeting Monday night, Portland councilors received a proposal from the Public Safety Committee that would require all motorcycles to bear an exhaust system label. Currently, Portland's ordinance prohibits operation of a motorcycle in such a manner that the public's attention is drawn to the source of the noise, according to the city's Web site.
Councilors took no action on the committee's recommendation, saying only that it would be discussed at the council's next meeting on Sept. 9. The noise law was unanimously approved by the committee at its July 14 meeting."
Follow here for Judicial Regulations pertaining to Motorcycle Noise.
"SUMMARY
By state regulation, motorcycles manufactured in or after 1979 cannot exceed a noise level of 84 decibels (dB) when traveling more than 35 mph on a paved street or highway. This is noisier than the maximum noise levels allowed for cars, but less noisy than the permissible noise levels for buses and other vehicles weighing more than 10,000 pounds. We could not determine from the Department of Motor Vehicles (DMV) or from the regulation’s history why DMV chose this particular standard. However, DMV may have used reasoning similar to that later used by the U. S. Environmental Protection Agency (EPA) when it set federal standards for motorcycle noise. EPA weighed the public benefit of less noise against the cost to motorcycle manufacturers of reducing motorcycle noise levels.
State and local law enforcement officers enforce state noise laws and municipal noise ordinances. Enforcement is difficult, however, because of demands on police personnel, the need to use sophisticated testing equipment, and the transitory nature of the offense. (By the time police respond to a complaint, the offender — and the noise — are usually long". Follow more here.