I know I'm resurrecting an old thread, but just wondering if you have made any further changes to this bike. Especially interested to hear how you got on with the airbox and rejetting as that's something I'm planning for my own project..... This was my first attempt and seems to be successful from a performance point of view as the bike runs very nicely albeit a tad rich but that just requires me to drop down a main jet size. It's all a bit trial and error. On reflexion, I think air box Mk 2 when I get round to it next winter will look a lot better than my first attempt but will also be on the same principle of a cut down primary box.