This reduced pressure draws a mixture of fuel and air into the cylinder through the intake port. This means that when the piston moves down from the top of the cylinder to the bottom, it reduces the pressure inside the cylinder. To simplify things, typically motorcycles with two-stroke engines are no longer produced, as they do not comply with the environmental laws of many countries and are not allowed to be driven in cities, and the debate between the two kinds of engines is more applicable to off-road vehicles, such as dirt bikes.Ī four-stroke engine, as the name suggests, has a piston that goes through four strokes (or two crankshaft revolutions) to complete one full cycle the intake, compression, power and exhaust stroke.
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