How stable do you feel over 100?

Let's, for argument's sake, assume I was on a private road. It's long, straight country lane / private road where you can see clearly for 500 meters plus.

I can get the bike up to 100 and beyond very easily but it starts to feels flighty. Not scarey or "fuck me, this is the end" but not rock solid either.

Bike, for reference, is a tiger 900.

For reference, I have also driven cars where over 90 feels like dicing with death and those which feels like you're doing 40... I assume bikes are the same?