This gear has 12 large teeth around tre outside of the gear that mesh with the gear on the kickstart shaft, 12 small teeth on the gear that meshes with the gear cluster and has a Ø20.5 mm diameter central hole.
 
Suitable for the following Vespas:
PX125E 1981 - 1984 VESPA 125 - PX125E DISC 1998 ON VESPA 125 - PX125EFL 1984 - 1997 VESPA 125 - T5 125 1986 - 1990 VESPA 125 T5 125 CLASSIC 1991 - 2000 VESPA 125 COSA VESPA 150 - PX150E 1981 - 1984 VESPA 180 RALLY VESPA 200 - PX200E 1978 - 1981 VESPA 200 - PX200E 1981 - 1984 VESPA 200 - PX200E DISC 1998 ON VESPA 200 PX200EFL 1984 - 1997 VESPA 200 COSA VESPA 200 RALLY ALSO LML STAR 125 2 STROKE