This fuel tap has larger internal drilled holes for improved / faster fuel fuel flow and is ideal for any type of Lambretta S1, S2, S3, GP, DL or Serveta, whether it has a standard or tuned engine. There are 3 different versions with different exit pipe positions and we have added a pic showing all the types available. This is the version with a SIDE fuel exit and is ideally suited for scooters fitted with a larger carb, fitted on either side.