Compatible with models:

Piaggio Vespa PX:
PX 80 (1981–1983, frame V8X1T)
PX 125 / 150 / 200 (including PE, PXE, P200E, and PX models from '94, '98, and MY 01 onwards)

Other classic Vespa models:
Vespa Rally 200
Vespa T5 125
Vespa GS 160
Vespa Sprint
Vespa GT 125 (1961–1973)