How would you describe 'a little off' ?
We have steering, acceleration and brake which are analog.
gear low / gear high and start button which are digital.
I assume steering is the most important of the controls.
So, maybe it could be over responsive or not responsive enough.
Case 1 would mean that a small turn of the wheel would cause the car to overreact.
Case 2 would mean that you have to turn the steering wheel 2 much before the car starts to turn as well.
It also possible that there is 2 much latency on the control and that the car only reacts a couple of frames after a steering adjustment?
I didn't have a cabinet to test with, so I can use the feedback for additional tweaking to improve game playing fun.