Yes, motorcycles under 300cc can have 2-stroke engines. The choice between a 2-stroke or 4-stroke engine depends on various factors, including the manufacturer's design preferences, intended use of the motorcycle, emission regulations, and market demand.
Historically, 2-stroke engines were commonly used in smaller motorcycles due to their simplicity, lighter weight, and potentially higher power-to-weight ratio compared to 4-stroke engines. However, in recent years, stricter emission regulations and advancements in 4-stroke engine technology have made 4-stroke engines more prevalent, especially in larger motorcycles.
That being said, there are still several motorcycles under 300cc that utilize 2-stroke engines, particularly in off-road or racing-oriented models. These motorcycles are often designed for specific purposes where the characteristics of a 2-stroke engine, such as higher power output and lighter weight, are advantageous.
It's worth noting that emission regulations can vary between countries, and some regions have imposed stricter rules on 2-stroke engines due to their higher emissions. Therefore, the availability of 2-stroke motorcycles in a particular market may be influenced by local regulations and market demand.