Single-cylinder machine structure is simple, and the same displacement of the multi-cylinder machine, with a light weight, small size structure, the use of single-cylinder machine is conducive to reducing the weight of the vehicle, it also improves the flexibility of vehicle control.
When using the engine horizontal arrangement, the crankshaft rotation of the gyro effect will hinder the motorcycle rollover, crankshaft heavier the greater the resistance. As the single cylinder crankshaft short, gyro effect is much lower, so left and right side light. As a result of single-cylinder machine with the above characteristics, so more than 250CC off-road motorcycle mostly single-cylinder machine, in addition, super sports motorcycle are mostly equipped with single-cylinder machine. In ordinary motorcycles, the general small motorcycles below 125CC using single-cylinder machine.