Harley-Davidson's Evolution and Revolution engines are both powerful Big Twin engines, but there's a lot that separates the ...

The V-twin is a core element of the Harley-Davidson story. Here's the history behind Harley's most important V-twin engines ...

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 ...

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 ...

The Evolution Big Twin-engined motorcycles like Fat Boys and Road Kings spent 18 years using a single four-lobed camshaft, while the Sportster's Evolution motor — and its ancestors like the K-model ...

There are numerous ways to describe an engine. You can distinguish the best overall Harley Davidson engines, but constructing a list of the most reliable Harley engines is a different exercise in ...

Harley-Davidson didn't become a cultural shorthand by accident — it built a reputation one mechanical turning point at a time with new engine layouts and design innovations. Some of those bikes became ...