i have a stock 2004 factory.
The only things i have done is valves checked, co2's set up, latest map downloaded all done by griff.
other than that I fitted an uprated motobatt battery, uprated starter solenoid, new clutch jet together with following the proper bleeding procedure, and the usual changing oil, plugs, brake fluid and plugs etc. Oh and fitted a 15 tooth front sprocket, this made quite a difference.
Thought about pipes and power commander etc but decided there is plenty of power to keep me happy.
Hope you enjoy the bike