Have you done 100 mph yet?
Back in early 80's when my K6 was stock I rather often could not stop at my highway exit late evenings/nights since the cooler air was really good for better power which I felt, bike wanted to run! Speedo slowly closing 190kmh.
Today, +30kg rider more but compensated with more cc, bike accelerate very stable passing 190kmh it can hold with ease. No wobble or other issues. It's more about the focus on the road, bumps, animals and other people on the road that make me to reduce.
Curves are thrown into my face way too quick in that speed too!
I can not see any use of a modern bike making 250-300kmh on a normal road.
Most fun on a SOHC CB750 is between 70-150kmh with occasional accelerations to 190kmh for a km or 2