I hate to spoil the fun, but the above (and very usefull) posts won't work until the limiter is removed from the carb. It won't let you either fully close or fully open the NV.

Ferocious -- if you feel brave, remove the limiter & start working your way through the info -- starting with the post from wtb3886.

If you don't feel brave, lean it out as far as it will go with the limiter in place (it won't hurt it a bit) & leave it there until your instructor actually "shows & tells" in detail, what you should do, & why.