Harley-Davidson Big-Twin engines have always tended toward the upper end of their contemporary displacement ranges, which ...

Harley-Davidson's Milwaukee-Eight engine has two spark plugs per cylinder. It's all about boosting performance, efficiency, and emissions, while reducing heat.

Harley-Davison motorcycles are known for their use of big V-twin engines. The company's proprietary engine design has come a long way since the introduction of the first 49.5 cubic-inch version in ...

Nowadays, the V-twin engine is ubiquitous in the motorcycle world. Powering everything from speedy sport bikes to massive touring machines — and even wedged sideways on some rides — the still-striking ...

Harley-Davidson was founded over 120 years ago and has been manufacturing motorcycles in America since 1903. The company's first motorcycle, the Model 1, was designed in 1901 and produced until 1904.

Charles has been in the industry for 19 years now, and has worked with brands such as Autocar India, Overdrive, Motoring World, CarWale, BikeWale and Powerdrift. He has more experience reviewing cars, ...

Few sounds in the motorcycle world are as iconic as the specific rumble of a big V-twin Harley-Davidson, but what about their engines makes such a unique sound?

TJ started writing for TopSpeed in 2015, but has been writing on motorcycle and automotive topics since 2009 for outlets such as eHow, eHowNow, and MotorTrend subsidiaries. He is certified to work on ...