I have a 99 F4 that is carburated. I just got the bike built and the only thing i need is a new fuel cap for the tank. It runs like ****, i am wondering if anyone has ever heard of the bike needing a vacum on the tank to run right, since there is no cap could that be the problem with it stutt stutt stuttering? Also will I have problem with the carbs flooding on tall wheelies? I am used to injected engines on my old stunt bike that was a 06 gsxr 600 and it would run even if you laid it down, any help would be a plus.