I just put a new supertrapp on my 84 big red, along with a new air filter. When i start it up it and let it idle it starts to run and then just quits. It will start right back up. It will run good after a bit. This may be a coincidence that the bike sat around for a couple weeks with gas in the carb. Any opinions on if replacing the main jet or slow jet will help? or any other ideas.