ok guys, here goes. i installed my 636 master/calipers about 2 months ago. used it for 2 trackdays, no fade at all either time. bled them thuroughly after the 2nd day. have dot5 fluid in them. stock lines, stock pads. they have been AWESOME from day one. then, wednesday going to work, i go to back down the driveway and almost crash, no brakes. lever went to the bar, no resistance at all. i pumped it up, and it was fine. rode to work, and by the time i got to work (about 3 miles) it was normal. then it was fine for two days. this morning, same damn thing, no lever whatsoever. this time, i pumped it up a lot, it didnt get much better. i rode to work (shouldnt have probably) and it never got to the same feel as before. then when i came out from work to ride home, solid as a rock. coming home on the freeway, with no traffic around, i grabbed a handful of front brake and it was like hitting a wall, just like before this happened. what the hell is going on here?!? i'm ase certified in suspension and brakes, and i have no idea on this!! i suppose my master could be bad, but i've never seen a master be bad sometimes, then just fine, that just doesnt make sense. help me out guys, i'm going to the track in a couple week, wanna make sure i'm dialed in. tia.