Harley-Davidson's Twin Cam engine powered much of its lineup in the early 21st Century, but had some common major problems ...

After reading my books and posts on twin development, twins have reached out to me asking for help understanding their anger, fear, or just plain unhappiness with their twin. Certainly, it is not ...

In spite of the fantastical mythology that “normal” twins can and should be mature enough to get along, in my personal and professional experience, this kind of idealized harmony is certainly untrue.

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 ...

The twin-turbo 3.0-liter V6 found in the early Porsche Macan S and GTS was prone to cylinder scoring – something certain 911 ...