Fast ? Its all time relative and back in the day we had what we had, today its again what and where we are now.
A spirited ride home one dark night on a 1970 trident was all a 19 year old Matty knew in 1977. But just a year later i had a 1975 Kawasaki Z1B900 and i saw 135MPH on that z1s speedo.
Year latter and it was the 1977 GS1000 and them in 1982 GS1100E , and without getting boring it went on and on the bikes just evolved improved if you like.
I will admit in the early 80s i remember talking to mates and we all agreed that tyre technology was going to be the limiting factor The avon roadrunner and Continental of the day were about all tyre manufacturers could create.

Embarrassingly naive but at that time again we knew no better.
I kind of missed al the 80s crap and just stuck to suzuki 750s/1100s in streetfighter form and never bothered with any other bigger bike but the mid to late 80s early 90s suzukis.
The sport bike thing never happened for me, any i did encounter were just parts for fighters.
Then in the 90s i had a ride on a mates fireblade and gsxr1000 and 750s and i did get the sport bike thing but never wanted in on it personally.
The fastest bike i have ever riden was abot 5 years ago a mates ZX14R it was fast i mean fast fast and chewed miles up almost as fast as i felt my drivers licence was desolving in my jacket pocket i swar at one point riding that bike i did hear the words " Will the court Rise"

.
My thughts are if you want a fast mile muncher that would be a great bike to own.
I Do hanker after an R1 i would like a newer crossplane cranker R! and guess what i would streetfighter it but thats the way i roll just sayin.