Compatible with models:

Vespa PX / PE / Arcobaleno: 125, 150, 200 (all models from 1980 onwards).
Vespa PK / PK XL / Rush / N / HP: 50, 125 (all series).
Vespa FL / FL2: 50, 125 (manual and HP/Automatic versions).
Vespa T5: 125
Piaggio Cosa / Cosa 2: 125, 150, 200