So OK, you're saying that when you advance the throttle from idle to max it accelerate OK but as it get to max it quits.

Does it run in a high pitch 2 cycle before quitting or does it sort of "blubber"?

If you hold it a little short of full power will it continue to run? If so, try opening or closing the needle valve by just a couple of clicks and see if you can get closer to full RPM then. If not, turn it the other way and try again.
Repeat until full RPM is available.
At full RPM you want to be able to pinch to fuel line (watch out for prop) just before where it enters the carb and have the engine accerate briefly and die of fuel starvation. That tells you it is running at just about the correct leaning point. If, when you pinch the line, the engine just dies w/o accelerating it is too lean.