Rigging rear wheel steering bike

hi you all,
I want to model the behaviour of the bike found at https://www.youtube.com/watch?v=9ijzld_X0eg
You can see the bike pivot point at 7:25
I want to model this model to find which pivot angle is the best.
I started the rig, but I know that what I have done is not right.
Do you have any rigging exemple with actuator ?

Thanks in advance


trial03.blend (1.43 MB)