2017 Harley-Davidson Forty-Eight, The first time the world saw this iconic gas tank was in 1948. But the world has never seen it sitting atop anything quite like this. The Forty-Eight. Designed with its signature bulldog stance and the powerful 1200cc Evolution engine. Large 49mm front forks, an adjustable rear suspension, cast aluminum wheels with floating rotors and powerful brakes bring plenty of handling and comfort to all this heavy-hitting style.