I thought the same until I rode behind a Harley 114 – you do not a worry, I couldn’t hear my 6 at all.
They sound loud until you have something to compare it to, like a KTM1290…Duke…Harley – get the picture, we’re right on top of it, from the side it’s just a nice plod-plod-plod old style.
The only time police with take to you is “what is it” or “I’ve heard of these, but not seen one in the flesh”