2003 NT Carbureted. I can take my NT out of the garage and it starts right up. The problem starts when I ride for awhile and turn the bike off for 5-10 minutes. It does not like to start back up. I have to choke it, give it throttle, and hit start. Sometimes it takes 2-3 minutes before it will start up. When it won't start, it sounds like a rush of air comes out of the carburetor when I let off the start button. A guy from work that used to work on motorcycles thinks it may be sucking in air from a hose or a loose clamp. Any ideas on what the problem could be before I pay Harley money I don't want to