Now that you mention it, I think I have noticed that phenomenon. But only in a range, you get below certain temps and it does not apply :-)
One phenomenon I really noticed on the the early flat 4 jap bikes, was that they got real light on the front end at 120+.
I think the standing temps that day were around 75 or so.
I was cold at 65 mph but at 80, I felt toasty.
Weird.
“One phenomenon I really noticed on the the early flat 4 jap bikes, was that they got real light on the front end at 120+”
Not a pleasant thought.
Bad enough that if I get too carried away jack-rabbiting from stop signs that the front of my trike lifts up.
[maybe I should start wearing jockey weights to hold myself down]...:))