You only ever hear about people who run away from cops badly. Motorcycles are usually long gone before the police have a chance to call a helicopter, which they would be able to outrun anyways if they were on a straight road.

To be clear though I don't think that's the reason loudness isn't enforced. I imagine it more has to do with the fact that they aren't watching for it since they don't have any way to easily test it like speed.

"You can't outrun a radio" is pretty common refrain among sportsbike riders upon hearing a tale of someone running from police.

Said by those that never try, and by cops that believe their own macho BS. Though often successful, I highly discouraged it, because it's very dangerous for yourself and endangers others as well. Additionally, make a habit of it and you'll eventually get caught and enjoy free accommodations courtesy of whatever county you're in at the time.

But one can most certainly outrun a radio.

What movie is that in?

Loads. They're all on YouTube filmed with Gopros.

Seriously bikes run from cops all the time. They're gone in a flash.

If they have a video with a license plate record of them running away from police, then why don't they revoke the plate and impound the vehicle at the registered address?

I take it you haven't seen the license plate covers popping up all over that basically make it impossible to read a plate from beyond a few feet away?

A representative example off GIS: http://www.v6mustang.com/attachments/dsc00087-jpg.35600/

Why aren't these cars/bikes fined while parked on the street?

I, too, would love to know the answer to that question. I've been seeing them all over in NY, where I understand they're illegal, and have no idea how they're not cop magnets.

Back in the day, I lived on a dirt road, and I never washed my car. So the tag was a little hard to read. But hey, there was nothing obviously intentional about it.