My issue with both of my MOXF8 keyboards is not with the release (where the metal piece returns to the “Stopper").  The keys makes noise as they are pressed, in the “attack phase” if you will.  Just lightly touching the keys makes a lot of noise.  Both keyboards have become extremely noisy the more I play them (hours per day).  I’ve replaced the keys with replacement keys (there is a black key replacement part, and 2 different white keys replacement parts), and lubricated everywhere I can find, all to no avail.  I cannot determine where in the world all the noise is coming from!  I cannot be the only person experiencing this!  And I am experiencing it on 2 identical units (one I use for the West Coast, one for the East Coast).

I love the MOXF8, it’s the perfect keyboard to satisfy my requirements… but wow, do the keys physically make a lot of noise as they are played.  I really wish someone could please tell me what the culprit is so I could quiet them down, please!  Does anyone know, please?

I am also having this problem and can’t resolve it.  My MOXF is 2 years old .  Certain keys are worse than others and I don’t hear it when I strike them hard.  I don’t hear the sound with headphones.  I’m in a band and it is annoying.  No problem with my XF 88.  I see that there was no response to your post.  Were you able to resolve the issue?  I’m going to call Yamaha.

Nope, even after all these years, still no solution found.  Please let me know if you have any luck with Yamaha!  The good news is that, although noisy, everything still works great!  And it’s still my keyboard of choice!  (I have 4 of them in 2 locations - a backup in each location!)