In order to adjust your main jets 3/4 to rfull throttle you need to rejet right? and for the pilot you can use air fuel for minor and rejet for the major changes? is this correct or could some one explain how this all works?

 

i belive thats the way it works [img]i/expressions/face-icon-small-smile.gif[/img]

 

yup, main jet must be changed to adjust full throttle, and air screws do a fine adjustment to 0- to about 1/4 throttle. Needle is middle

 

Yes, basicly you're right.
There is also a midrange circuit which can be adjusted. The clip position on the needle, can be moved to raise or lower the needle in the needle jet. This will effect the 1/4 to 3/4 throttle.
Heres a good article on jetting.
jetting