2-Stroke VS 4-Stroke Engine

Maybe from past days or years you have own a 2-stroke engine motorcycle or if not you have seen someone owning one. Even scooters are available in 2-stroke and 4-stroke engines. The question will be, how the 4-stroke is better than 2-stroke? Why does manufacturers now stop launching or releasing any 2-stroke engine motorcycle anymore? This question will be answered in this thread and hope to help you to find for the information you are looking for.

First of all lets define what is the meaning of the word "stroke". Stroke is the movement of the piston in the cylinder back and forth. The length of the stroke will be determined by the crankshaft or the distance travel of the piston in the engine cylinder. The 2-stroke engine has two strokes to complete a power cycle. The end of the combustion and beginning of the compression stroke happen simultaneously, with the intake and exhaust stroke occurring at the same time. This is a contrast when it comes with the 4-stroke engine that needs four strokes to complete a power cycle.

Advantages and Disadvantages

2-strokes have a high power performance in comparison with the 4-stroke. Also the 2-stroke has few moving parts that makes it lighter and simplify their structures. This engine type also have a low cost for maintenance. The disadvantage of this type of engine are lot more than its advantage. This engine type don't last that longer and lubrication is needed for the mixture of fuel gas. Poor lubrication may caused the engine to wore out even more faster. It may cost a little bit that it almost consume a gallon of oil in every 1,000 miles. The fuel economy with this engine is not that good as part of the mixture leaks out in the exhaust port because the intake and exhaust process occurs at the same time, making more pollution than other engine types.

The 4-stroke engine has better fuel efficiency than the 2-stroke engine. Less pollution and you can save more in terms of fuel consumption. You don't have to buy gallons of oil to keep it working that help you also to save more. This engine last longer than 2-stroke and durable for use. Has more torque making your engine quitter and more reliable performance. The disadvantages are 4-stroke engine cost much higher than the 2-stroke, maybe because of the materials and components use also its system. 2-stroke engine has more power making the 4-stroke only with half of its power in comparison. This engine is more complicated because of some additional parts in the mechanism like valves. Making this engine hard for troubleshooting and cost more higher.