Like I said in another thread, I believe from 2013 on KYMCO changed the program in the computer. But they were not honest to start with and denied the problem, so now they don't want to admit that there WAS actually an "unclean curve" related to the the earlier (US) D/T's.
The reason why there is good evidence to me, there was a post here from a member about his hesitation problem on his brand new D/T300i , and the member received, after not giving up, a "new computer". He told me personally, "it is all resolved now".... Guess what, it wasn't a defective computer, the new computer has an updated new program.