Funny sound at over 20mph

[unfazed]

My money is still on the fairing infills. I've had a very similar sound to what you describe on mine, and turned out to be this. Some extra sticky foam pads around the edges cured it. The loose mirror pivot is typical of aftermarket mirrors - they're not very good quality. Makes me wonder if the bike has been dropped at some point, which would explain both things.

:agree
If you have ruled out the chain and it is from the front and I did the same as Nick did as the vibration from the infills was driving me daft. You would not see it.
Other  probably cause from the front is a loose reflector in the headlight loose mirror in the holder as they are most likely aftermarket, wheel bearings and last but unlikely are some seized disc bobbins.