Welcome Lucky.
AK 550 owner here.
None of the newest models from Kymco have their own sub forum so I just put "AK 550" as part of the title for any threads I start in one of the main General sub forums (General, Technical, Roadcraft, etc).
I imagine the first difference between the AK 550 and CV3 is how many wheels. And the bits and parts that make up the front end. I don't know for sure, but I would think there are a lot of similarities with the rear drive systems. The engine is basically the same engine as are the CVT and other drive train parts. I would not be surprised to find that most of the accessories for the AK will fit on the CV3 as well. But I also don't know if the under seat storage is the same so there is that to think on.
How do you like the CV3?