carburetor jetting

I just purchased a 2002 1200 bandit that has a Yoshimura exhaust cannister and a K&N filter pod on the carbs. The original airbox has been removed. The previous owner had re-jetted, but obviously incorrectly. It runs very rich, pops a bit and has no midrange. Does anyone know the basic set-up jets for this configuration?

I'm no demon on carbs as I proved by putting the baffle back in and the k&n but it sounds like the needle hight needs sorting there is something that may help I'll see if I can find it and post it on here it's all about mikini carb's.( found it) It won't let me post externa links yet but you can go to mikini.com and it's all in there.