system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are there seemingly no sound restrictions on motorcycles?

Great answers so far. All I can say is I can't wait until all these fucking things are electric.
gpt
It seems to me more a question of the noise restrictions not being enforced for anyone, but motorcycles tending to be run loud more often than other types of vehicles.

This may be a function of emissions requirements; many cars require exhaust treatments to "Pass Smog," while in many locations, motorcycles are not required to be tested at all.