Ok I think I've got that problem fixed I set the valves and retuned the carb and it seems to be better. What I want to do now is run a 34 tooth sprocket on the rear and change the main jet. I live in north central ohio what main jet would you use and where would you set the needle valve. Also would you recomend a dry high flow air filter. If so which one and where can I get one. Will any fit the stock air box cause I'd like to keep it if i could.

thanks for the tips ive done alot of work on fuel injected cars but im pretty new when it comes to small carb. motors like whats on my lifan ill keep you updated on my progress thanks again