VESPA Scooter (USED) - Import requirements

Does any one know the requirements or why it is any more difficult to import a used Vespa. I have been told a couple times that it is more difficult the "used" Vespa than other ordinary bikes. This is for a friend of mine who imports 10 to 20 Motorbikes (from the USA) every 2 or 3 months and aparrently he says that there is some special problems with the VESPA. I am looking to hear from somebody that actually has some recent experience or can steer me to a source of information. I understand there is a "VESPA CLUB" in Thailand and I am posting this in hopes that some member or official of the club can help. I am in Pattaya till May 13th and then in the US. Any and all help will be appreciated.

Also, if there is a better place to post this topic (inquiry) I would appreciate help on that too...... Thanks