bi turbos come with restrictors???? sounds fishy, did u take off the silencer???
dean your an asshole i'm an asshole too
if you don't know what different number jets do i think you should read up on 2 stroke performance if you want to get "real" speed from any of your pocket/tomos bikes.
the reason people on this forum snap at questions like that is because it is assumed that everyone in performance section knows the answers to them. If the performance section was clogged up with posts about what jets do or, should i get a 14:12 or a 15:15 carb then it would make the section useless for real performance talk.
read up on your bike and why the parts work certain ways and you won't even have to post on this forum to figure out how to get fast, the forum is mostly opinion with a few good threads of solid information. search for those threads and extract all the info you can, also keep in mind who writes what as non of our advice is moderated.
btw the different jet number refer to the size of the hole, bigger numbers are bigger holes. stock bikes come with jets in the 50-60 range, polini bikes usually run 80s-90s, 70-80cc kits can run up in to the 130's its all relative to your setup.
the size of the hole determines how much gas goes into your carb, you want the right amount of gas depending on how much air your engine can intake.
the process of finding the correct jet size for any given bike setup is a step in "tuning"