I have a Malossi Multivar 2000 Item # 5111397. The item is new but it has been removed from packaging. I bought this by mistake from Scooter parts Co. in Charleston SC. He wont accept returns. No problems with him, his rules clearly state NO RETURNS.
It will fit these scooters

APRILIA APRILIA MOJITO
APRILIA APRILIA SCARABEO 125
APRILIA APRILIA SPORTCITY 125
APRILIA APRILIA SPORTCITY ONE 125
DERBI DERBI BOULEVARD 125
DERBI DERBI BOULEVARD 150
ITALJET ITALJET TORPEDO 125
ITALJET ITALJET TORPEDO 150
PIAGGIO PIAGGIO FLY 150
PIAGGIO PIAGGIO LT 125
PIAGGIO PIAGGIO LT 150
PIAGGIO PIAGGIO TYPHOON 125
VESPA VESPA ET4 150
VESPA VESPA LX 150
VESPA VESPA S 150

here is link to page
https://scooterpartsco.com/malossi/01-malossi-master-part-list/malossi-variator-for-vespa-et4-lx-150-lxv-s-150?zenid=06785cdbba04d4a722b0e827c14cc32e