It's friendly race between ZX10 and ZX9R Turbo. Roll on 60mph to 180mph. ZX10 is stock and butter flies removed. ZX9R Turbo low boost 8psi, Gears +1 front, (not -1) and corrected speed with speedohealer. The ZX10 is 100 pounds lighter than the ZX9R Turbo. The difference weight is total weight with riders.