In 6th, it'll go all the way to redline without any mechanical worries.
There's no point in this, as the powerband ends somewhere between a few hundred to a thousand RPMs before redline.
If you're going 60 or 70 in 6th, you're shifting too soon.
Not to beat my point to death, but this is one of the things that experience teaches you. It's ill advised to be learning all these basics of motorcycling while riding a highly tuned purpose built racing bike.
I'm not trying to insult you, I'm just saying that when it comes to safely learning how to ride, your odds are bad. And it's not all power and speed, in fact, that's the least of it. That's one thing you can control easily. The big problem is the geometry of these things. When you start on a replica, you have to not only learn how to ride, you have to learn how to ride on the most difficult and twitchy bike available.