I need help. I don't know what the problem is. The bike runs fine when I first start it and as long as I just let it sit and idle. After I get on and start ridding for about 5 minutes it starts to choke itself out. If I pull the choke out it will start going again but it idles at higher RPM. I can keep adjusting the choke, but It will only run at really high RPM or starts to choke out. Any Ideas?