Ah!! A picture is worth a thousand words
![Cheesy :D](https://www.kymcoforum.com/Smileys/default/cheesy.gif)
.You have removed the "needle holder" and main jet together or (attomizer). The little round jet at the end will come out of that. You may have orderd the wrong replacement or they sent the wrong one. The shape does not matter so mutch as the thread size. I think it's the 7mm.
Anyway they will separate and the main in your other pic looks a little long,but may be O.K.
Keihin and kymco have made it realy hard to get the right damn jets!!! It should be for a pb 16mm i believe.