Good exhaust is a MUST. Remus was the one I used, lifetine guarantee on a full stainless race system, pick whatever can you want, its the 4-2-1 bit that makes it work. TTS in Towcester had my bike's spec as a Bandit upgrade package after the success of mine. Ig advancer and run premium, then you can have the jetting done professionally, different in the centre cyl's to the outers. Guys that did mine used little drills in the carbs. GSXf 600 valve gear, not the nasty screw and locknut y type you have. The later GSXf had the valve gear from the gsxr750. They use shims and give you another 2000rpm or so. With it set up right it will light up at 6k and really fuck off at 7, just like a gsxr, and unlike a 600 bandit, difference is the 600 is a long stroke engine so torqueyer than the 750, gives you 886 with 750 barrels (after machining the top case) but that eats the gearbox if you spank it too much as the 600 doesent have the thrust bearings the 750 has, (people keep quiet about that). Filter obviously and Vernier cam sprockets with some racier cams if you feel the urge. That's all I had in mine. Exhaust was the juicy bit at 6-700 quid depending on material. The valve gear and the exhaust is the magic beans. Keep the inlets as tight as you can and run the exhausts lose ie extreems of spec and your flying. But it will look like a bone stock 70hp bandit. ps, erm, don't expect to save fuel. Expect to go from 60mpg to 35/40 and far less at say the IOM. Couldn't do 2 laps.......! pps good oil is a MUST. I sold mine at 34000 miles (bought/tuned at 1800) after a totally trouble free life in rock synthesis 4