I just bought a 82 750 super sport. Mine is runing rough too. I do need to clean the carbs but it´s also been stalling and draining the battery. I took it to a shop and the dude said I need, not only to clean the carbs but to clean and check the contenuity of the electrical conections. perhaps you may also have some harness problems. I´m not looking forward to all the time i need to spend , but I think the bike is nicly styed and quite powerful.