Electric circuit system for motorcycle

An electric circuit system for a motorcycle having a body frame and a storage box disposed substantially at a central upper portion of the body frame, the storage box including a lid member for opening and closing the storage box and a lock mechanism including a solenoid means and an electromagnetic unlocking means for locking and unlocking the lid member, said electric circuit system having an ignition power circuit and a solenoid power circuit, said electromagnetic unlocking means having a key switch means comprising:

• a cylinder lock unit including a rotor;
• and
• a switch unit having a first switch and a second switch, each capable of being opened and closed in association with a rotation of said rotor, said first switch controlling an activation of said ignition power circuit and said second switch controlling an activation of said solenoid power circuit, said first switch being closed at a first point of action taken by the rotation of said rotor from a locked position by a predetermined rotation angle, said second switch being closed at a second point of action taken by further rotation of said rotor from the first point of action, said first switch maintaining a closed position during the rotation of said rotor between the first and second points of action, said rotor including a retention mechanism for retaining the rotor at the first point of action and a spring means for restoring the rotor to the first point of action against a further rotation of the rotor, wherein said lid member can be unlocked while the ignition power circuit is activated.