OK, here we go.....Round 4 on trying to solve this on going problem. '01 YZ426 front brake master cylinder causing fits. Bleed the unit once, worked for 1 ride, got mushy (meaning none existent). Bleed it again, same results. Took the bike to a shop, bleed it, same results. Took it to an "expert"....blah, blah, same results. (though this time it lasting a bit longer) This is what I know (or don't)......after bleeding the brake it functions the way it needs to, after 1-2 rides it starts to show signs of degradation. There are no leaks! (meaning no signs of dirt accumulation around common leak points.) What needs to be replaced? master cylinder, caliper, cable? Please help.