Motorcycle engines live and die by how well they shed heat, and the choice between liquid and air cooling shapes everything from performance to maintenance. Riders weighing a new purchase or planning ...

Whether we're talking about vehicles with two or four wheels, a primary goal of engineers is to wring out as much power from each unit of displacement for every engine they make. This keeps weight ...

An image of a HD bike engine with cooling fins - DiPres/Shutterstock It's no secret that Harley-Davidson is one of the biggest-selling American-made motorcycle manufacturers. After all, since its ...

Indian redesigned their flagship Chieftain motorcycle with a liquid-cooled V-twin and advanced electronics—for better or worse. When it comes to American V-twin motorcycles, there are two types of ...