Originally Posted by Bekologist

you move the front brake cable stop closer to the wheel to shorten the distance between housing and brake to lessen the shudder effect.

There's some flex that occurs in front brake cable runs on large headtube bikes that can increase the tendency for shudder. the tension in the cable wavers from the flex, and the brakes begin to quickly 'brake and release' resulting in chudder.

Move the cable hanger from the headtube spacer stack to the fork crown with a fork mount cable hanger. this drastically shortens the cable length that is a primary cause of brake chudder from bikes with cantis,long headtube and a high cable stop.

A healthy amount of toe-in can also minimize shudder, but it leads to uneven pad wear.