might help if you list your bike model as well, different carbs for different series i think.

"Working on one carb' at a time, first note the original settings, in case you ever wish to return the carb's to their original state. Screw the air screw in, counting the number of turns carefully. Now unscrew the first float chamber. Push out the float retaining pin and carefully lift out the float. Keep each float and needle with its respective carburettor body. Note that as you remove the float the float needle will come out too. You will be greeted by a view similar to this:"

found that on this link, the way i read it its not in the float bowl, anyone with a pic could enlighten us both.