With 40 HP on tap, a near 9,000 RPM redline and a 6-speed 140 KPH sounds about right. 85 MPH is a right good clip on an inherently aerodynamically draggy dirt bike. The 180 MPH Hayabusa has aero body panels and a "cockpit" for a good reason.
The historical baseline is that it takes about 30 HP to hit 100 MPH, assuming proper gearing and rider blended into the paint. The Scram version of the LC452 will be tons-o'-fun for the street folks.