Intermittent fault when breaking, front break does not stop but no change in lever pressure, random problem with no pattern to when it happens, please help ?

 

Ok so do you hear anything happening up front? As in when nothing happens? Does it say not work then you let the lever go then it does work right after? How are your pads up front? Have you had the system opened up at all? (As in a disconnnected brake line?) Is your brake fluid level at the proper level? Are you able to get the front wheel off the ground to attempt to duplicate the issue? Thanks.

 

What color is your brake fluid? It should be clear. If it's brown, then it's full of moisture and can cause your lever to stick.