Need help please / Trampa Spur Gear Drive/ VESC 6 MkIV

Hi Guys,

Firstable im new here and don't now much about vesc etc, i hope i dont break any forum rule, my english is also not perfect, sorry.

I bought a Trampa spur gear drive a few month ago (VESC 6 MkIV inside).

I got 2 problems :

1/ The board was supposed to go 50km/h it go barely 40km/h

2/ when reaching top speed the acceleration stop too brutally which cause me serious speed wobbles.

Ive been into this with trampa guys for weeks but it looks like they dont know whats going on, they made me change a lot of things in the settings on the VESC app but it doesn't change anything.

I was hoping someone have the same board here and can give me the complete settings he has on the app...

Thank you so much

Olivier