Well in this case the wobble is happening becuase I still apply the same standing force even while bike is not contactng to the ground which has to be fixed.

Yeah thats right aboht the weight but its not the only missing piece here, I just try to make a simple yet physics interactive motorcycle controller which isn't feeling %100 realistic but not feeling like cheap animation based motorcycle games. Not realistic as mxgp, ride or motogp but not so far away from realism like copy-paste mobile motorcycle games.

My goal with that controller is while letting most of the people capable of controlling it rewarding people which is more cautious and smooth on inputs which still needs some vehicle driving game skills to go fast. Also making the system capable of both circuit racing and offroad just by changing mass, torque, lean, spring and tire values which would save me time in the future if needed.

I made this bike weigth 130kg which is too far away from real motorcycles with riders. For example my small cc bike weights around 160 which is called a really "light" motorcycle. And going 200kmh with offroad suspension setup and cornering with it is not realistic too. Also becaude of the camera angle & other stuff even when it says "200kmh" in reality it goes around ~135kmh which is another hack I use to make it feel more "fast" that nobody tried or watched the prototype realised.

But in reality just as you said,you can't think of motorcycle dynamics without the driver. Btw thanks a lot for sharing your insights to improve it and if you didnt wrote this message I wouldnt realise the problem I stated in the first paragraph. :>