A Parallel-Twin Engine is a type of internal combustion engine that features two cylinders arranged side by side. This configuration allows for a compact design, making it popular in various applications, including motorcycles and small cars. The engine typically has a 180-degree crankshaft, which helps balance the engine's vibrations and provides smooth power delivery. These engines are known for their simplicity and efficiency. They often produce a good amount of torque at lower RPMs, making them suitable for urban commuting. Many manufacturers, such as Kawasaki and Honda, utilize parallel-twin engines in their motorcycle models for a blend of performance and fuel economy.