Hey Joe,
Legally I can't give you a top speed as I live in Bermuda where the speed limit is 25 M.P.H.!!!! (which sucks!!) but I get 60k.p.h. @5500 r.p.m. in top, red line is at 11500 r.p.m. so work it out!! Should be good for at least 120 k.p.h.
Maybe when I've got $1000 to spare for the fine and fancy walking for 2 years I'll see what it realy does!!
Still what a great bike,
All the best,
TONY.