In this moment, amount of the motorcycle vehicle is fast increasing. Everyone have a motorcycle also more than it. Over use of the motorcycle impact are stealing improved every year. This research has conducted a security system for motorcycles based on Arduino Nano which is to protect it. Our method is used a password to control the machine power. This system is calculating a mistak e the password entried in three times frequency and also it can trigger the alarm sound, so the machine cannot be activated. This system is mounted with the infrared remote which used to control the alarm sound on specific range. As for user is entrying the password correct and the Arduino Nano connected with relay coil then the machine work. Result of this research is shown accuracy of 100% when the password correct or wrong are trai ned. In Addition, the remote has proven work the alarm sound activating with accuracy of 100% in one meter, 80% in three meters, and 60% in seven meters.