While major motorcycle manufacturers produce a wide range of impressive mainstream bikes, the custom-built world of motorcycles is far stranger, with some examples that seem to break all the rules.

Five is a very unusual number of cylinders for a motorcycle engine, and the most familiar examples graced track-only prototypes that brought world championships in two eras to Honda. If storied ...

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 ...

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 ...

Before Chevy small block V8-powered Boss Hoss Cycles and seven-cylinder aircraft radial-engorged JRL Cycles Lucky 7s, there was the 1966-1980 Münch Mammut. In English, that's "Mammoth," which is the ...

KTM’s Automated Manual Transmission (AMT) combines clutchless gear shifting with manual control. Details on operation, gear ...

The Van Veen OCR1000 was a rotary-powered engineering flex and one of the rarest motorcycles ever made. And now, it can be yours. In the grand history of motorcycles, some of the most fascinating ...