you can't cure problems caused by a jet that's too big by turning some screws.. nothing regulates fuel flow at wide open throttle except the main jet size. If your air intake is wide open and the mixture is still rich you need a smaller main jet.
power is where there's barely enough fuel.. you gotta run almost too lean. Extra fuel cools everything down, slows combustion and wastes fuel and can cause misfires.
People are afraid of overheating their engines and tend to use and recommend jets that are way too big. This drowns the engine in fuel and kills power, but it's safe from overheating. Chances are you need a main jet that is smaller than any jet that anyone around here will recommend.
There's only one way to tune your bike.. to get carburation and ignition timing correct. You have to study and understand what's going on inside the average two-stroke engine and then learn to do plug chops and to properly read spark plugs. Taking other people's advice is easy.. but it has strict limits when it comes to tuning your bike.