Finally
After 4 years of trubble and no brake power if you press quickly, I decided to put in a new Wilwood proportional valve.
The brakes before work verry well , if you steped on it slow, but no reaction if you quickly brake.
I changed 2 times the proportional valve in "original" style, probably both were made at the same factory, the same reproduction-****....
One I bought at Yearone, one at Inline-Tube.
Both had the same failure.... if you step quick on the brakes, the brakes didn't release for a while.
If you steped quick on the brake pedal, nearly no brake effect.
If you steped slow on the prake pedal, you almost flown out the window.
I wanted to let you know what's happening now.
Fix and bend new brake lines around the Wilwood proportioning valve and........
it works perfect......
Thank you for your feedbacks and support