i don't think you can really do anything to be honest. I mean you could try to contact the guy / leave a note or whatever and hope he reacts accordingly, but in the end it's just one of those annoying things that you're pretty much gonna have to deal with or hope goes away.
I remember when i lived downtown some of the noise from motorcycles was crazy loud. It would drive me insane, but what was i going to do?
Don't go to the police. You have zero evidence that he did anything wrong (unless his exhaust is illegal or something which it probably isn't).
Just my $0.02