Better Performance Output

If it was mine, I would make sure the combo that's THERE is in optimal tune FIRST, before changing anything. Often times, when one does not run to the potential the owner thinks it should, it's simply a case of not having the best tune. "I" would try that first. It may pick up the gains you're looking for.
Wish I knew how to tune them or where to go to get it tuned....The last tune before I changed over to the Air gap intake cost me just over $600.00 They did an optimum tune with jet/metering rods and changed out the weights for timing advance. They did an awesome job with its performance, but the tune cost me as much as a new 750 double pumper....thinking of getting both carbs tuned to the engine and just using the 750 on the track