The servomotor located in the servo housing can exert:
- a force allowing the change of position of the carburetor
- a force acting on the brake lever.
Problem: these forces slightly move the servo housing, through elastic deformation of the housing under the effect of stresses. The consequence is that acceleration and braking are less responsive.
It is necessary to stiffen the housing + motor + gearbox / brake assembly, without introducing a clash with the previously printed pinion.

Here with the correct design made in Part design, we are able to make the car more responsive. The Part was produced in Velizy Fablab in PLA material, + a steel variant in case it does not stand the proximity of the hot engine.  

Thanks to the Fablab