When it comes to eight-cylinder gas engines, GM has some twisted engineers who are hard at work in its labs. No, they're not crazy, unless you consider the almost fanatical obsession they have with ...

Decades ago (OK, half a century or more), there was a product advertised in many of the performance magazines called the Varicam. The idea was a set of springs attached to a centrifugal device that ...

Variable Valve Timing isn’t a new concept in motorcycle engines. The likes of BMW and Yamaha have been using this setup in their motorcycles for a while now. Even Suzuki itself implemented it on the ...

Harley-Davidson has filed a patent application for a variable valve timing (VVT) V-twin engine, possibly for the Sportster to improve economy and reduce emissions. The iconic American manufacturer has ...

Variable valve timing isn’t necessarily a new idea, but it is new to BMW motorcycles. With a freshly designed 1,254 cc two-cylinder flat engine, VVT is arriving in BMW bikes for the first time with an ...

Variable valve timing (VVT) and variable valve lift (VVL) have very similar names, both referring to variable valve performance. Does that mean that they are basically the same thing? The are most ...

Indian Motorcycle is not only building a new engine, but also seems to be updating its current Thunderstroke 111 with variable valve timing or VVT. Last month, images surfaced of a heavily disguised ...