I have the vespa primavera 1982 from Spain.
I have learnt that the sleeves need to be 1350 mm long. Just like one I just tried on the bike. But that cable maybe less that 1 cm short to fit perfectly.
Apparently here you order a cable nipple for the handlebar end and adjust yourself.
So the cable I tried first was too long, but the sleeve was too short (i will measure this later). Otherwise I could have cut the cable shorter and use a cable nipple.
The second cable´s sleeve is fine. The cable is a little short I think. I could use the first cable with the second sleeve, but I cut the bottom end of that cable by mistake.