[MartijnHols]

“Loud pipes save lives” is a contentious topic that has some influence on this. Not being noticed in a car is very much less dangerous than on a bike, so it makes sense that more motorcycles are louder as for some of them, that is the goal. People also tend to ride motorcycles because they want to rather than have to, which makes them more likely to tweak their bikes and exhausts.

One of the things I like about driving an electric car is that I can accelerate stupid fast without causing a scene, but I have no interest in an electric motorcycle.