Thanks every one .
I have already a big issue. When I bought the ak550, i signed the contract, and only a day later, when i received the documents of the bike, i saw it was the 2017 model that was first registred and used in march 2021. So I made the mistake thinking it was a 2021 model (i bought it second hand at the dealer).
He hid this information ffor me because i told him, when looking at the bike, next to him, :" i like the fact that it is a 2021 model because the 2017 model had a lot of issues. And he did not say:" o wait a minute, it is the 2017 model.
So i have written them an email where i explained this and asked to "destroy" the deal, and sell me a new ak550 or a new xciting 400S I am waiting for their respons.