a good dyno tune and fuel management . here is what just that did to the bike
Mine went from 63.99 hp to 75.41 hp and 78.16 tq to 87.36 tq. I did rush slip ons and pc lll and big sucker. I had a dynotune done. canned maps are ok but if you want smooth responce at any speed or throttle get a dyno tune done by a place that knows what they are doing

 

Like TK said, by tunning the fuel curve to the bike it will produce the most power. Each bike is just a little differn't. It also makes it smoother