Depends on the rider. Some riders like 1 finger brakes and some like spongey. My front brake was rubbing and I didn't even know until I did a wheelie past the finish line and the frot tire stopped rotating. One racer showed me how the put a bit of air in the line and the rubbing stopped. During the off season I rebuilt the entire system and no issues so far.
Sometime when I bleed my brakes to dam good the brakes drag on the disk. I just hold the lever down and open the bottom screw. Then let it go to suck a bit of air in and that fixes it right up.
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