Usually when jetted too rich, it will have a bit of a gurgley sound and smoke from the exhaust at certain throttle positions. You could have someone watch as you drive it to see if it blows a puff of smoke durring the bog. I would bet it is a lean spot though. I would try lowering the clip to see if it gets any better. Check out the pdf manual I mentioned. It will educate you to make the best guesses on jetting. Without being able to drive it or hear it run, it is hard to say for sure what circuit needs attention. Also check to make sure you have no air leaks between the carburetor and cylinder head. If any of the gaskets or o-rings are not completely sealed, air can be drawn in and cause a lean condition. You can spray a little starting fluid around the areas and see if the rpm changes.
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