If a motorcycles is loud you need to report it to the police.
Contrary to popular belief, motorcycles are not manufactured to be loud. When motorcycles come from the factory, they are reasonably quiet–because they are factory- equipped with effective mufflers.
All highway and off-road motorcycles manufactured since 1983 are regulated by federal law under the authority of the Noise Control Act of 1972, which is still in effect. Federal regulation 40 CFR 205, parts D&E regulates their total noise emissions. It also regulates their mufflers and requires motorcycles to be equipped with EPA-approved mufflers, not just when leaving the factory, but at all times while they are in the United States. It is a violation of federal law to tamper with the emission control devices of motorcycles–even those devices that control their noise emissions (their mufflers).
Excessively loud motorcycles are the result of the deliberate action of their owners to alter their exhaust system–which is illegal. -
https://noisefree.org/sources-of-noise/motorcycles/