Originally Posted by Trevtassie

Somebody mentioned to check your housing. Squeeze the brake levers gently until you feel a reasonable resistance. Looking at the lever on the caliper squeeze the buggery out of the brake lever and see if the caliper lever moves at all. If it doesn't and you can still move the brake lever towards the bar a fair way the cable is stretching/ housing is distorting. Something like Jagwire Road Pro will fix the problem.