A good standard Gen 1 will make around 120 - 122bhp so yours is well within the frame, since on any given day dyno results can vary by up to 5% just on weather conditions/operator test technique etc etc. Tired plugs, dirty air filter, an overtight, worn or poorly lubed chain can all combine to rob you of several bhp, too.
Stock jetting is rich on the main jets at full throttle. Don't lose any sleep over that. More important is how the motor responds to part-throttle inputs lower down the rev range.
If it feels good to ride, forget the dyno results and enjoy what you've got.
If you feel the need for more, though, Ivan's is the way to go.