David - it's just the PP that pushes the T/O bearing & fork back; if you've already replaced the master & slave cylinders, and the clutch line, then you probably need to look inside the bell housing. One other possibility, did you check the hard line that runs from the master to the flex line? It that got dinged at some point it may be causing the problem. Otherwise I would guess PP. What clutch do you have in there now?