Modifications to a 2010 Ninja 250R

Has anyone done anything other than Jetting & exhaust to help in the performance of these bikes. My finance has decided to get one. I would like to modify it as much as possible to make it preform.What about Body Mods as well. Let see them & here about them My immediate thoughts are ditch the mud flap, flush mount singles, under tail kit with integrated signals, axle mounted tag, Seat Cowl,