It's not all about top speed. A Geo metro 3 cyl will still do 100 mph, and a my Nova ran the 1/4 with a trap speed of 98mph. I would blow the doors off the metro.
What I'm saying is the "seat of the pants" feel and power band of a kit that's set up like this has the potential to be much quicker and more fun, while that one figure somehow make people rate bikes when there's so many other factors to consider.
I guess if all your interested in is top speed, this is the wrong hobby. Get into racing at Bonneville or something.