Compatible with models:

Vespa PX:
PX 80 E / Arcobaleno / Elestart (1981–1997)
PX 125 E / Arcobaleno / Elestart / up to 1998
PX 125 T5 / T5 Elestart (1985–1986) and T5 Classic (1985–1995)
PX 150 E / Arcobaleno / Elestart / up to 2005
PX 200 E Arcobaleno / Elestart / up to 1998

Vespa PK / Other models:
Vespa PK 50–125 XL / XL2
Vespa PK XL (1985–1989), PK XL Plurimatic (1985–1990), PK XL Rush (1988–1989)
Vespa FL (1989–1990)
Vespa FL2 Automatica (1990–1991) and FL2 HP (1991–1997)
Vespa N (1989–1990)