Violent shaking when front braking

I just overhauled my front hub, front brakes, steering column en shock of my Primavera 125. When I brake de steering is shaking violent; what did I do wrong??

hI;

 

MAY THE HUB IS NOT CENTERED CORRECTLY

 

PLEASE MEASSURE IT OUT

 

THX

 

 

 

it was the brake drum