obmar
visit one of berger's links for a full list of the needles. you'll find that they're all there except sometimes the K51 is missing. the dimensions for this are in a thread from only last week titled i think "K51 v K35 what's the difference".
the emulsion tubes get larger from 264 gradually to 274. they effect the whole jetting set-up but especially the midrange.
to tell you what each needle does would take too long. all we can do is give you a picture so that you can try things and build up your knowledge. however as you come to each hurdle we can help you as best we can.
i did over 30 tests on my FE400e w/ the dell orto fitted. i had 5 needles already and gradually built up a picture of what worked and didn't.
if and when you need more info-please name your machine.
regards
Taffy
