Notch/Center stop disappear when loosen the central bolt

[felder78]

I experienced my motorcycle to wobble and when I want to tightened up steering head, I realized that when I turn the handlebars, there's notch/center stop.
Tightening the adjustment nut (below the upper triple tree) 1/8 turn, the handlebars is smooth and there's no play when I grip the lower end of the fork with both hands and jerk it back and forth.

After I tightening large central bolt of the upper triple tree, the notch/center stop is coming back(top fork bolts is still loose). If I loosen the central bolt of the upper triple tree, the notch/center stop is gone. So I tightening a slightly tight. Notch/Center stop is a bit softer. I ride the motorcycle for a week and the wobble is gone.
*My motorcycle still use ball bearings

Do I doing right?
Do I still need replace the bearings? If yes, is it okay to ride for another 3 months? Because I live far from the city
Thx in advance

[Easy-X]

Might be worth mentioning manufacturer/model/year but yes you don't want it too tight or too slack. Last bike I did it was tighten up till the slap had gone and then give it a quarter turn more.
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Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[Pete.]