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.

Internal combustion engine blowby, whether gasoline or diesel, occurs when part of the compressed mixture of air and fuel leaks past the piston rings during the compression or power strokes of a ...

Show me the facts Explain it like I’m 5 Give me a lighthearted recap Watch out video on the greatest diesel motorcycle engines of all time. We're talking the Sommer 462, Hero Motorcorp RNT, Track ...

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, ...

Any certified gearhead knows that diesel engines do not use spark plugs. But why not? If power in an engine is created by combustion or explosion of flammable liquids, won't a spark plug in a diesel ...

Alex Jennison, a 22-year-old engineering student from the University of British Columbia, is riding a motorcycle powered by used cooking oil down the West Coast to showcase "sustainable innovation." ...