In the late '80s a new version of the Darda motor was introduced, called the Darda-Stop motor (later renamed to the Darda Stop-n-Go motor), it allowed the motor to be locked once wound so that the car could be placed on the track without immediately setting off. This allowed for longer tracks and 'tag-team' relay style racing where once the first car had gone round the track and just run out of power, it would tap the back of the wound up one and set it going.