Motorcycle exhaust law?

Anyone here live in Washington State and has modified their motorcycle exhaust. Did you have any trouble with the cops because the law say "No person shall modify the exhaust system of a motorcycle in a manner which will amplify or increase the noise emitted by the engine of such vehicle above that emitted by

Anyone here live in Washington State and has modified their motorcycle exhaust. Did you have any trouble with the cops because the law say "No person shall modify the exhaust system of a motorcycle in a manner which will amplify or increase the noise emitted by the engine of such vehicle above that emitted by the muffler originally installed on the vehicle, and it shall be unlawful for any person to operate a motorcycle not equipped as required by this section, or which has been amplified as prohibited by this section." so has anyone have any trouble with that?

Best Answer:

Scott: I'd guess upwards of 75% of motorcycle owners modify their exhaust in some way, and every state has a law similar to that. You use common sense – if you have loud pipes on your bike, you don't rev it up in front of a cop and try to be a good neighbor so the people in your neighborhood don't complain. If the police get enough nuisance complaints, they may investigate. Some states are tougher on this than others. I believe MA has some pretty strict enforcement, as do some Canadian provinces. I live in AZ, we have a lot of bikes here and I know of a couple of small communities where they have posted noise ordinances, just don't be a jackass and you'll be fine.

Other answer:

Scott:
That law is on the books in every state.
Unless you are involved in a traffic accident, or have committed a serious crime while operating your bike, that law will never affect you.
Police don't carry decibel level detectors with them.
That's only one more infraction that can be added to your offense in a court hearing.

Motorcycle inspection stations are supposed to check exhaust decibel levels when performing the bike's yearly inspection (for the inspection sticker)
They overlook that part of the inspection, because they're the one's that sold the exhaust pipes in the first place.
They wouldn't be able to sell pipes if they failed everyone for using them.

CB:
In most states there are noise laws like that – what I have seen, if you can behave around people (in town) not rev the bike and just putter through, you will be left alone. Unfortunately too many owners of bikes with loud exhausts didn't get enough attention from their parents as children and screw it up for everyone else.
Exoplanet:
A more interesting question is how to enforce exhaust laws. None of us have ears calibrated in decibels and decibel measurements are almost impossible in an uncontrolled environment due to sound reflection and absorption differences. Since you care, check out the WA courts website for cases. Tell us what you find.
curmudgeon55:
Couple towns have bought decibel meters, paid for them in 2 months , made fat profit for rest of year and noise level really dropped after $120.00 repair tickets, NTA
adam:
those laws arent enforced. If they pulled over every loud car truck or bike thats all they would ever do.
Ron:
No

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