“ I had a BMW R74/5 motorcycle. If, without a fairing, I even got it up to 60 mph, it became very hard to control because of the terrific force of the wind. “
Something else was going on. Lots of naked i.e. unfaired bikes go over 100 mph all the time with no control problems. Dirt bikes (with knobby tires!) have been to 120. My Buell (not me riding) 140 with only a tiny handlebar fairing.
Buell? Sheesh, those things haven’t been made in ages... you must put in some time and care to keep it running.