Just curious - what are you doing that you want a 24mm carb?
Its been a few years, but I bought a new intake for my LC S9. It is a factory Kymco intake, just like the one from the S9 but larger on the ID - 21mm as I recall, whereas the stock is 19mm? I noticed no difference; purchased it from an Ebay seller in Asia, and was changing from the Arreche carb to Dellorto.
It is such a strange shaped intake - and serious tuners are turned off by the length. But short of making your own custom intake, there has been nothing available with a larger ID.
The Malossi adapter merely allows the change from the factory flanged carb to an aftermarket spigot carb - the "Malossi" carb is a Dellorto.