[Kirk V]

Definitely check the float levels, Jim sent mine to me and they did not set them. The fuel was so low in the bowl it could hardly suck it over, causing horrible jumping and drag between the primary and secondary jets.
I made a jig to check and set the levels according to his web page to accomplish this.

After the bowl level was correct I was able to get the air bleeds set correctly and it was all downhill from there.

If you are running high rpm you will be running on your larger jet size and definitely eat some fuel instead of running on the idle jets.

My 2 cents.