Bike sits for a few days, the front brake lever is all spongy, put the brake bleeder apparatus on the bleed valve on the Radial Master cylinder, suck out the air, it's where it should be -- couple days later; it's spongy again. History: New brake pads, lines bled, fluid swapped out, topped of, no air in the lines to the calipers, but up top, the Radial Master Cylinder is toast -- or so my analysis is. I think a seal has worn out or something. Anyone else have this or heard of this problem? And, what's the fix, a new Radial Master Cylinder? I'm sure KHI will get a pretty penny for that baby!