Harley-Davidson has produced some of the most recognizable motorcycle engines ever built. Some became famous for their sound, others for their performance, and a few for completely reshaping the ...

The Harley-Davidson Forty-Eight motorcycle is no longer in production. Here is what happened to it, along with some other ...

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 ...

Throughout the history of Harley-Davidson, there have been a great many engines offered across various models. And for decades, these engines have presented buyers with a rather unique issue. In terms ...

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 ...

Harley-Davidson is famous among motorcycle brands for more than a few things: its muscular chopper motorcycles, long-standing history of innovation, and in-your-face road warrior attitude, to name a ...

Allyn started writing for TopSpeed in 2015, but has been writing on motorcycle and automotive topics since 2008 for outlets such as eHow, USAToday, and subsidiaries of MotorTrend. Formally trained as ...