Model codes are a great way of not only understanding what Harley-Davidson motorcycle you're driving and what it's capable of ...

These are the 4 worst Harley engines: the overheating AMF Shovelhead, vibrating Late Ironhead, the worst -- Twin Cam 88, and ...

Harley-Davidson motorcycles have always been defined by their engines. Owners and loyalists know the names and nicknames for each successive powerplant version. A new engine represents the start of a ...

Harley-Davidson's Big Twin is the heart and soul of America's most famous touring bikes. As Cycle World put it: "If ever an engine inspired religious fervor, this is it." This fall the icon gets an ...

FLTRX shows it’s a Big Twin touring bike (FL), a Road Glide model (TR), and the X designates its trim, defining it ...