The power stroke extracts work from these gases as they expand and force the piston to BDC. In the exhaust stroke, the exhaust valve is open and the combustion products are expelled from the cylinder.

The stroke is considerably shorter, and uses energy of the engine's exhaust vacuum to assist in the combustion cycle ... multiple arrays of cylinders (2, 4, 5, 6, 8, etc.) in an engine from ...

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 ...