I have the kevs fuel mod,02 controller,Leovince exhaust stage 1 and 2 air filters, I have modified my snorkel for better air flow but did not want to completely remove it as did not want water going in air box when washing the bike. And I have the fuel mod set at 5.5 and bike runs spot on and will go straight to 100mph. Not that I really do that on the bike. Just got back from 2 days riding around the highlands of Scotland. 260 miles one day and 370 the next bike never missed a beat. 8 hours in the seat one day and 9.5 the next day.lots of twisty roads grate ride over apple cross pass.