BJ

First thing I would do is check the float bowl heights. If they are out, it's a simple job to bent the tabs on the float to increase the amount of fuel in the bowls before the flow is cut off, this will help to avoid fuel starvation.

If it wasn't just in one corner I'd suggest you also look at the needle, size and circlip posityion.... It's less likely to be the problem, but you could try changing needles or the circlip position. The safe route first is to put the needle circlip a notch lower down to richen it up in the midrange (9k was the problem area you said) and if this makes it worse, go the other way. Take care though as if you go too weak you will seize.

Good luck

Dan