I own a 1981 flhs, shovelhead, that I've had for just over a year. I'm learning a lot about m/c's since I bought this bike. I just developed a new problem with my carburetor. Gas began flowing out of the overflow line. I noticed this after just starting the bike and expecting to let it do it's normal warmup when all of a sudden it started coughing and stalled out. Then the gas began flowing. I didn't know what was happening but to keep this short, I eventually tapped on the carburator and that stopped the gas flow. I got the bike running and got it home, shut it off and again the gas started to flow but this time not so fast. I shut the gas valve off and that's where this story ends. I presume something is sticking in the carb. What should I look for? Not being a mechanic...yet...is this something I can repair or should I pay the bucks and have a shop work on it? Thanks.