When you say everything, do you mean you have the air filter tray, air filter element AND the 3 holed snorkel in place? If any one of those are missing, start there. If they are in place, clean the carb again. I don't just mean blow some air and carb cleaner through it. Get in there with the finest wire you can find and probe every single fuel AND air passage.
If it's a clone carb, there is your problem.
Does it idle clean without choke?