Compatible with models:

Vespa Rally 200 (model with frame/engine prefix VSE1T), produced between 1972 and 1979.
Vespa PX 200 / PE 200 (models P200E, PX200E, Arcobaleno, Freccia, and versions with disc brakes), with engine prefix VSX1T, produced from 1977 to 2000+.
Vespa Cosa 200 (CL, CLX, and FL versions, equipped with a 200cc two-stroke engine)