"From what I understand the pilot jet is for idle to 1/4 throttle, the needle is for 1/4 to 1/2, and after that it's all main jet. This may not be 100% correct. "

thanks

 

it's not totally correct.

Closed to 1/8 throttle—air screw and pilot/slow jet

1/8 to 1/4 throttle—air-screw, pilot/slow jet, and throttle slide

1/4 to 1/2 throttle—throttle slide and jet needle

1/2 to full open—jet needle, spray-bar/needle jet, main jet, and air jet

(Note: On many modern carbs the spray-bar/needle jet and air jets are fixed-diameter passages in the carburetor body and cannot be altered.)

A good carb refference http://www.eric-gorr.com/tech/carb1.html