CBR 600RR 04

I been having problems with my bike “front brakes”
The brake feels fine if the front tire does not move, when I move the front tire the brake does not have any pressure. I pump the brake again and then goes back to normal.
I change the calipers, I change the fluid but did not solve the problem, and then I move to the rotors (maybe they are bend), I got a used set of rotors “not sure if they are bend as well” and I continue to have the same problem.
Everything I research online is telling me the rotors are bend because when you move the front tire the rotors move the calipers side ways if they bend. This creates for the brake not to have any pressure.

Has anybody experience this problem?