you have air in the system,you must bleed the brake furthest away from the master cylinder first,then do each one in turn,get a rubber tube put it in a jar with brake fluid in the jar,fit tube on to bleed nipple on the brake cylinder,get some one to press the brake pedal down as you ,open the nipple you will see air bubbles come out of the hose,keep your eye on the brake reserv keep it topped up,whaemn all bubbles stop from first brake,tighten the nipple and do the same with other brakes
mm, June 2011