Just so you know, the larger carburetors (larger than the 19mm nt and hp carbs) aren't really gonna do anything for you until after you have a proper expansion chamber and reed valve. For most bikes, the stock carb will do just find no matter what setup. The big carbs are more for advanced/race engines in mind.
But you say you have a performance carb. Do you mean the high performance carb (hp carb)? It says runtong on it and looks like this. It is not one of those big carbs.
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