Two areas to check on a carb, which I almost never see mentioned, are float level and transition mixture. The former is adjustable, but the latter is (usually) not.
A low float level will give you a hesitation on acceration because there is a delay in getting the gas to flow in the main system, as the carb goes from providing fuel from the transition portion into that main portion.
On the other hand, too high a float level can cause fuel flooding at worst, or bad/poor gas mileage at least. Try to set the level at the manufacturer's recommended point, though you could go slightly higher if needed.
I'm not familiar enough with this carb to say much about the transition curcuit, except that almost always this part has a fixed jet which meters fuel. If a guy really knows what he's doing, he could determine the size of this jet with a drill index (metric, I'm sure) and then go up one size to drill out the jet. Finding those tiny metric drill bits should be a real challenge! (I own the inch size bits in size #60 down to #80 and they are really handy for carb or hobby work.)
NOTE: Drilling jets is extremely tricky business! You can actually make the jet leaner by over-drilling it, as burrs and ridges left from drilling can cause turbulence, which the leans the fuel flow!
I suggest to anyone who is playing with carbs, whatever brand, that they find one of those old Holley car carb books and check out the first chapter or so, which covers basic carb theory and uses a down draft single barrel carb drawing to help in understanding what is really happening.
Once you get a grasp of the overall theory, the whole process of dialing in a new or different carb set up is much, much easier!
