I have a 1979 Ironhead Sportster and she runs good I´m new to riding and I want to know if I´m safe to drive her a couple hundred miles on the highway at 65 miles an hour new tires oil all whole nine yards is tuned up it´s rides good I just don´t know and fourth gear can I hold it at 65 mph and not blow my engine I don´t know I heard that the sportsters aren´t good for riding long distances that´s why I´m asking