/\ /\ /\ /\ What he said.
With a stock setup, what you got, is, what you got, but there are a couple of things you can do to get a little more oomph.
Make it breathe better, by either taking off the air box lid, or fitting a filter directly on the carb.
If you do this you need to up the main jet a couple of sizes, then do a plug chop.
Advancing the ignition by about +4deg should give you a little more in the low/mid range, but this works best with a pipe designed for the lower register.
A set of dual stage or V Force reeds will increase the throttle response, but not really give any more power.
A marked improvment in power is gained by the choice of a good pipe.