Surprisingly, the biggest Yamaha engine today is under 1,000cc. But you do get a near-200-horsepower to back that up ...

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 ...

There is this phrase Americans love that says there's no replacement for displacement. For one reason or another, the country came to the conclusion that the bigger the engines used in their cars are, ...

In the middle of the 1980s, legendary motorcycle manufacturer Harley-Davidson was in a full blown crisis: numbers were down, morale was nonexistent, and innovation was a pipe dream. AMF had bought out ...

If you're just getting into motorcycles, it's important to know exactly what sort of oil you're putting in the engine. What does the 4T designation mean?