An engine number is a special alphanumeric code that is imprinted on a motorcycle engine, and its primary use is as a unique identifier for the engine. Manufacturers differ on what is included, but ...

The Knucklehead, Panhead, and Shovelhead are all important parts of Harley-Davidson history, each preceding the one before it ...

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 ...

Somewhat unexpectedly 2024 was a very good year for the motorcycle industry. I’m not talking about how many two-wheelers were sold during this period, but about the many new technologies that have ...

We’ve all heard the stories: there are motorcycles out there that can (and do) put a frankly insane number of miles on the odometer, and all they need is regular preventive maintenance. The holy grail ...

Cooling fins are an iconic feature of motorcycle design. These blades made their mark early, with their parallel lines encircling the cylinders of classic bikes from day one. Whether on the striking V ...

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 ...

Close up of engine cover on a Harley-Davidson Milwaukee-Eight engine - Felix Geringswald/Shutterstock Harley-Davidson has a long history of powering its motorcycles ...

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 ...