For what it’s worth;
The Crg family of karts can have a little slop in the lower steering bearing when new. It seems the od of the lower bearing is a little smaller than the id tubing in slides into. I just slightly oval that tubing at the bottom of the steering shaft where the bearing resides and it does not move.
You can get quite a cumulative amount of slop with a little in the tie rods, a little in the bearing etcc… Next thing you know you are experiencing a 4-5 mm toe change under loads.
Rick