I have a 72 hd shovelhead kick start with an S&S carb, electric ignition. I´ve been having problems with it cutting out. At first it was only after a long ride and has progressively gotten worse. Now I can´t even ride it a quarter mile and it cuts out, but I can always get it started right back up. Looked for a possible short but to no avail. What other options am I looking at? Thank You in advance for any and all help