Need carb advice

[lennonfan007]

My airbox recently was rendered useless on my chinese 50cc gy6. I had an open-air cone filter laying around and decided that would be a good opportunity to install it, but I would also need to upjet. I currently have a 90 jet in and a jet set on the way. What size jet would you recommend? At this point I realize no amount of adjustment to the carb with the 90 jet would stop it from running too lean to ride safely.