Okay I just rebuilt my engine New crank,New pistons etc. Installed Vforce 4 reeds and timing +4 it also has fmf gold series which where on it before rebuild. Is idling fine and runs fine until it get to a certain spot and just won’t go any faster it’s no where near as fast as it was. I’ve tried making less and more rich with no change,Gave it more and less air and still no change. Carbs are so clean you could eat off them. I’m at a loss onto what to try. Could I need to rejet my carb because of the reeds or is it something else. Any help is greatly appreciated. Thanks