Monkey bike is the name given by Honda. These vehicles were considered a monkey with small size, low-power motorcycles displayed in the 1960s. Monkey bike is popular during 20th century. This kind of bike all had a 4.5hp 49cc single horizontal cylinder four-stroke engine, and a seat height of less than 22 inches (55CM). Nowadays, the suspension is added to the front forks and rear. It becomes more stable. Because of monkey bike, the bike gives the operator a special performance. It makes the person looks like a monkey.