Even for cars, there's also the issue of how the noise measured, compared to the real-world use. And even for motorcycles, that are standards, and even if there's no mandatory regular inspection, police are allowed to control vehicles randomly. But they practically never do it for some reason.

I'm familiar with the measuring method for motorcycles, which basically means that a powerful enough motorcycle will be very quiet when tested because it will be running at very low RPMs (the standard is 3rd gear at 50 Km/h – on my bike that's around 1500-2000 RPM out of 10000).

The noise issue is with people flooring it just to stop at the next light 200 m down the road. And also badly tuned exhausts that pop like crazy.

I'm actually wondering if this hasn't become a fashion for some reason, since I hear more and more cars make that noise. And those cars look pretty expensive, so I don't think they have aftermarket exhausts, if only because changing it is a bit more involved than on motorcycles, and pretty much all newish-looking "fast" cars seem to make that noise.

But I agree, in Paris at least, loud motorcycles are more of a nuisance than cars, if only because there's more of them. Cars do tend to get on my nerves on weekends, though.

And it's just yearly I think? I think modders will just revert mods for inspection and then redo mods after they have passed.