Not all 1000cc motorcycles have four cylinders, as the number of cylinders can vary among different models and manufacturers. The engine configuration of a motorcycle is determined by the manufacturer's design choices and the intended purpose of the bike.
While many sport bikes in the 1000cc category do have four-cylinder engines, there are other configurations as well. Some 1000cc motorcycles feature twin-cylinder engines (also known as V-twins), which provide a different power delivery and characteristics compared to four-cylinder engines. Additionally, there are single-cylinder and triple-cylinder motorcycles in the 1000cc range, although they are less common in this particular displacement category.
It's important to note that engine displacement (e.g., 1000cc) refers to the total volume swept by all the cylinders within the engine. The number of cylinders and their configuration (inline, V, or other) determines the specific engine design and performance characteristics. If you have a particular motorcycle model or brand in mind, it's best to refer to the manufacturer's specifications to determine the number of cylinders in the engine.