Hoping someone here can offer me some direction, I have a k0 750sohc running f type carbs in a sidecar Motocross outfit I'm having hell n all trouble getting it to run right! The engine runs an electrexworld digital twin CDI ignition. And the fault seems to present like a fueling issue. All the carbs have been cleaned thougherly and re sealed new pumper diaphragm and floats. Float levels are correct and a plethora of jet combinations tried! Ticks over lovely revs to distruction but has a flat spot a mile wide between quarter and flat out. Run pure avgass in the tank. Any help would be appreciated! I'm suspicious the exhausts aren't helping but I'm a two stroke monkey so four popper exhausts are a dark art to me!