Is a 70cc bike a 2 stroke or a 4 stroke?

A 70cc bike can be either a 2-stroke or a 4-stroke engine, as the displacement refers only to the engine size and not the type. Both engine types are commonly found in small motorcycles and scooters. The choice between a 2-stroke and a 4-stroke depends on the bike's design and intended use, with each having its own characteristics in terms of power delivery, efficiency, and maintenance.