Security system for motor bike

Figure below shows the move triggered securiry systems for motor bike. whenever the motor bike is moved from its position, the solder bob attached with the spring sensor vibrates and make in contacts with the washer which is at ground position, there for the monostable multi using 555 (fig 2) triggers

Fig 1: SENSOR

Fig 2: ALARM

Fist of all the connection circuitry is fixed motorbike in a proper position. when trigger pulse is applied by the sensor circuitry to alrm circuitry. the monostable multo triggers and its out put will be high for a time period os 3 minuts approx. Because of this high out put the piezo buzzer activates and generates sound indicating the move ment of your bike. the time period can be varied by varying the resistor R1 and capacitor C1