Unless you're really into dirt bikes, you probably haven't touched a two-stroke engine in decades — if you ever have. These mechanically simple motors combine the four strokes we all know and love ...

The sounds. The smells. The feels that electrify the senses and carry you back to simpler times. For many motorcycle enthusiasts, working and riding on two-stroke bikes capture the essence of a bygone ...

Add Yahoo as a preferred source to see more of our stories on Google. One of the most significant contributions in the history of propulsion technology came from a 19th-century engineer named Rudolf ...