In the country I'm currently living in, many people who ride 50cc bikes add custom exhausts, that amplify the sound to even worse than Harley's. Yet similar bikes with normal mufflers are almost silent. It's insane.
I also see families with young kids with no helmets and even babies riding on bikes in crazy loud traffic. Breaks my heart. I'm in a very well insulated car with filtered plugs and still get annoyed by some sounds.
Yes I think a 50cc Motorcycle with a modified Engine can be the most loud 2 wheels vehicle ! How fuck is that ?
It is especially because the noise is very high-pitched !