77 750k... carb issues?

[wanick]

picked this up last friday and it starts up and idles ok.  when i get to about 4 rpm it stalls out.  getting frustrated.  cleaned it all up (actually had someone throw it in a ultra sonic) jets are fine, new plugs, and gas, etc... its starving for fuel for some f*&%ing reason and i dunno what to do.  

[Re-run]

Well a couple of things to try.
When you start to get up to 4000, pull in the choke and see what happens. If it runs better, it is likely too lean then. Another thing you can do is run it as high in the rpms you can and then pull the clutch and kill the engine. Pull the plugs out and see what they look like.

What air filter do you have? Where are the clips on your needles set?