Adam, does your bike sound overly loud? I suspect that with the 2021 weight loss and power gain the sound is amplified like the thin walls of a violin. No extra material or stuffing. But if it is not annoying then it is fine. My mid-drives are not loud. I can hear them but I do not think someone riding another bike on a bike path would be able to hear them. Some bikes such as the Como had an internal belt step down which cut noise but cannot be as efficient as internal step down gears. These motors are high rpm. The ones I use run at 4,000. A little sound is a small price for the upside benefits.Wonderful advise! Thank you all!
Tomorrow on our group ride a 1500W bike will join us and a $10,000 hub-drive. I will listen.