2003 z1000 vs gsxr 600 

The Z1000 Will beat any 600cc from 0-125MPH like the ZX6R 636, R6, GSXR600, cbr600rr etc. because it has shorter gears Speedo reads 171MHP but guy is really only doing 160ish. These 600cc super bikes rev at least 15+RPM and have 120hp+ and go 170. From 135MPH-160MPH the 600s will win.

That wind is no joke on the z1000 it's not like a sport bike that has aerodynamics