Hi, I bought my Firenze a couple of weeks ago & the only trouble that I have experienced is with the cold start, as it has been said, you need to hold the throttle open a bit until it warms up, then it will idle, this will be sorted with the dealer soon.
As for the servicing every 2,500 kilometres, if the oils are changed at that interval & all bolts & fasteners checked, there is no need to check the tappets or major work,( every 5,000 should surfice ) unless you thrass the guts out of it between servicing, as for changing the spark plug that doesn't need repacing until 12,000, if you buy a KLG Iridium replacement, it will last in exccess of 50- or 60,000 Ks.
As for the belt & rollers, if you use the bike as a stoplight racer, yes they will need replacing around 10,000 Ks, if you treat it right there isn't any reason that you don't get 20,000 before replacing, I'm a 65 year old Ulysses club rider & due to the old bones I have bought this Scooter to keep riding & wish I had changed a long time ago, for the money it is a great Bike
As for the price of parts, if you are prepared to buy overseas on the net you can buy a lot cheaper but remember your dealer is there to not only sell you a product but to give you good service, if you think you are getting a raw deal, tell him, everyone is approachable & all said & done we need each other for it to work.
Regards & Safe Riding.
David