Code Â§ 175.152 (relating to exhaust systems); and 67 Pa. Code Â§ 175.181 (
(5) Approved SAE modulating lamps are legal.. . (1) The exhaust system of a motorcycle may not be modified in a manner which will amplify or increase noise
Pennsylvania. Every motorcycle must be constructed, equipped, maintained, and operated so that the vehicle does not exceed the sound level for the vehicle. Every motor vehicle must be equipped with a muffler or other effective noise suppressing system in good working order.
Motorcycle Inspection and Equipment Regulations. The following information is in PDF format. Table of Contents; Sections A and B. Subchapter A – General .
I'm thinking of unreasonably loud motorcycles for the most part, but. Unfortunately, noise laws are difficult to enforce and low-priority anyway.
I don't know if you already know this, but it is illegal to have any aftermarket exhaust in NY. I know you are talking about PA, but it has been that .