As you increase compression you need to lean it out. When the engine has been running for a minute or so it will be at operating temperature, that is the time to make final adjustments. Once you have the needle set for peak mixture, decrease compression slightly until it starts to decrease RPM. Now increase the compression until it is at peak (no RPM increase with more compression). This is your peak setting. Pull the fuel line and let the engine cool. Try to restart without changing compression or needle.

Looking at your setup, you might want to lower your tank to just below the intake or you may get flooding from the fuel in the line siphoning into the engine when you choke it to get fuel in the line.

Good luck.

George