Been mentioned a few times but always worth an outing
When they first ran top speed tests on the Honda Blackbird, the rider was asked why he kept feathering the front brake
He assured everyone he def was not !
They eventually found it was the wind pressure on the brake lever
Which is why, right through the entire production run from 1996 to 2008,the front brake lever is a different shape to the clutch lever, having a tapered leading edge
As far as I know, this was never replicated on any aftermarket levers, so is a good way to spot if the bike has ever had to have a cheap replacement for any reason
Had the same effect on a bike with bar muffs fitted, over about 70 they pushed in enough put the brake light on