how fast should it be

my vf still seem slow it tops out at about 95/98 now anyone got any ideas
dave

Have you checked carb diaphragms,fuel pump and hoses for kinks,leaks at vacuum pipes,exhausts for loose baffles or blockages,do the butterflies open fully when throttle woud back and also airfilter.
Have you checked speedo reading correctly not slow.
What sprockets are you running,what rpm showing at your top speeds?
Have you checked brakes for binding ie do wheels spin freely.
This may or may not give you something to go on.

          IF IT AINT BROKE MODIFY IT.

Most importantly

When did it start running like this,was it always like this .

As it revs does it rev smoothly through the rev range?