I bought my first Harley last month and I'm having alot of trouble with it. I carb leaks gas everytime the bike sits still. I don't know anything about these carbs so could someone help me with it? It has an S & S air cleaner on it but nothing about S & S on the carb. I did find it says Harley Davidson on the side of the carb and has these # on top: -0712, 27502 86B. Can someone tell me what carb this is?