Cento giorni a Palermo

In the very first frames of this scene, the Suzuki was a Honda:

Looks like a GSX 750 E (1982). http://www.suzukicycles.org/photos/GSX/GSX750E/1982_GSX750E-III_black_380.jpg

BMW R65

1981, but R 65 or R 45 ? In Italy the smaller engines were most popular...

Moto Guzzi V50 PA as built from 1983 to 1988

Vespa P 150 nope don't think so, I think that's a Vespa 50 Special. :-)

Another Vespa, * star:

A 1975 Z1-B (from the colour) with optional dual front disc brakes, which became standard the following year. http://www.motorcyclespecs.co.za/model/kawasaki/kawasaki_z900%2075.htm