You have good info here. I just want to add, it sounds to mee that the LOW end is lean. You run on the low speed needle until around 2/3 throttle. I would adjust the low spped needle out maybe an 1/8th turn at a time untill you get the mixture right. Do it with the engine off and after adjusting clear the engine at full throttle for a few seconds to clear it out and check it then. Good luck.

Mark Shuman