This top quality, bottom race or track is fitted onto your forks on top of the dust shield on all series 1, 2, 3 and GP / DL Lambrettas. They often get pitted with rust over the years and can make the steering ' notchy ' so it makes sense to change them if it has not been done before.
 
  To remove the old one, use a thin drift in the two holes (usually clogged with dirt!) in the underside of your forks
 
  To fit use a soft drift and tap down on opposite sides, if it locks up, remove it and gently run a file around the fork stem (fork stems vary in size, some are tight some are a perfect fit, if you hit it down and it locks and you keep going the race may split)