I am sure this applies to a dominator as well but this was on a 4150. When I was happy how well my carb ran at wide open I measured all the areas that flowed fuel on the primary side and calculated the fuel flow area. Then knocked down the main jet size until the air fuel ratio cleaned up during street driving and highway cruise. When I was done I calculated the area of flow again, then added the difference back into the power valve channel. This made a carb that cruised clean, got good MPG, and ran the same wide open.

Now, I hated that process, it took awhile with lots of testing and trial and error. I have all these tiny drill bits and pin vices that are no fun to use. That process really made me look into fuel injection and once I switched I couldn't be happier and will never go back.