what kind of bike? zx7r? carb or fuel? you said float bowl so i'm assuming carb.
at what rpm range is it running rich? your mixture screw will generally only effect your idle up to about 25% throttle. upwards of that you might need to adjust your needle position, or change jet sizes. the only real way to be precise is to dyno tune it or at least put an air fuel meter on it and find out exactly what's going on. wha type of carb is it? i'm assuming it's a cv model. is it mikuni or khelin? they have different jet numbers. did you do a jet kit too, or just commander? the more info the better. good luck.
ok just reread your post, it said jet kit and not commander, sorry. did you change your main jet, or needle position. if so, try a different jet or try lowering your needle position, usually this will lean out your mixture. but mostly effects middle range and top end throttle positions. without knowing what type of carb it is, is hard to tell ya exactly what to do.
Last edited by bowb4me; 07-05-2007 at 06:42 PM.
Reason: reread post