The N911 upgraded version is equipped with the king of air-cooled power, the PR250 six-speed balance shaft big-head engine, with an actual displacement of 249.99ml. This engine has low vibration, low noise, strong power, and long life; it adopts PE30 Nibi carburetor, which has a large power The idling speed of the vehicle is more stable; the new color matching makes the vehicle more dazzling and colorful.