https://auto.howstuffworks.com/muffler3.htm
Exhausts only work properly when the baffles are still in there, many remove them, including a few bikes around our way. I doubt a stock SV would trigger above 95dB
so I'm OK ( not that I intend to go to Tyrol anyway ).
Once again the actions of a few % who want wide open pipes are causing problems for the many who really don't want to ride around sounding like a mobile crow scarer.
I am still surprised MOT does not check noise in both cars and bikes, I know some people put baffles back in for MOT, but some don't and they still seem to pass.