While two-stroke engines are less common in modern motorcycles compared to their four-stroke counterparts, there are still a few reasons why they continue to be used in certain applications:
Power-to-weight ratio: Two-stroke engines have a higher power-to-weight ratio compared to four-stroke engines. They generate power with every revolution of the crankshaft, as opposed to every other revolution in a four-stroke engine. This results in a higher power output for a given engine size, making two-stroke engines popular in racing motorcycles where lightweight and high performance are crucial.
Simplicity: Two-stroke engines have a simpler design compared to four-stroke engines. They have fewer moving parts, which means they are often lighter, easier to maintain, and less expensive to produce. This simplicity can be advantageous in off-road or trail bikes, where durability and ease of maintenance are important.
Compact size: Two-stroke engines are generally more compact than four-stroke engines. This makes them suitable for motorcycles where space is limited, such as small displacement bikes or scooters. The compact size also contributes to better maneuverability and agility.
Cost: Two-stroke engines can be cheaper to manufacture compared to four-stroke engines. They require fewer components, resulting in lower production costs. This cost advantage can make two-stroke motorcycles more affordable for certain markets or riders.
Stricter environmental regulations and a focus on reducing emissions have led to a decline in the use of two-stroke engines in many countries.