There is a fix now, my dealer has told me that it is a rubber nipple that lays air in and he is going to replace it, this should fix this problem
I think so.... I believe I just got this installed....lots of history with the clutch /bleeding issue - 2013 base 10900 miles....
Early on @1000 miles or so, I had an experience in street mode where I could not get the bike in N while at a full stop if the bike were running. With the bike in gear, clutch pulled in to bar, it would creep/lurch forward, impossible to get to N while running. Got to the point to where it was simply unsafe. So I had my dealer pick it up and check it out. Not only did I have a bunch of air in the system, the fluid was super dark- coffee like, zero clutch functionality.
It seemed like I was boiling the fluid, getting the super dark color and air bubbles that follow. So the fellas freshened the system, bled it for a check, no leaks, and everything seemed in order. Service mgr suggested I check this periodically and report back. monitor this.
Now watching this nuance, the frequency for bleeding began; it became necessary every couple hundred miles, most certainly after a full day @ track or hard riding. Was it the heat? Dunno bleeding fixed it.
Once I was @ 7500 mark, service check time, my bleeding process requirements were reported to the service mgr. There were others experiencing similar clutch issues, so they replaced the master under warranty. Awesome dudes, Moto Union Ducati & TJ rock, so lucky they take care of the pani.
With fresh stuff, new master, I was on my way, but not out of the woods yet. Again, darkness approached after a couple hundred miles, clutch activation lessened to the point that it required a simple bleed to get it back.
Bleeding my clutch had now become a process involved in general ride maintenance check every so often. super easy.... Seems we could swap out the slave, but unsure of any success or resolution. Figured I would upgrade to a Cnc unit later, just haven't gotten around to it. Bleeding was like checking tire pressure in my view, no big deal. Done countless times at the track.
I think I understood why it was happening (air developing in a sealed system) perhaps boiling occurs based on how lines are routed around the Pani's fire breathin' motor. Or it could be a bad ring somewhere, bad slave, but with no leaks we were simply swapping out all variables. No visible leaks and when bled, it's perfect. I'm cool.
After a recent service with TJ, got a recall update installed related to the slave @10000 miles (unsure exact details, I think what Manny speaks of) it seems to have improved. Close to 900 miles since and no bleed required thus far.
New rubber nipple rocks!!