After five years of faithfull service, my Kawai CL35 had his first issue. The problem was a sticky key, at first I thought it was due to a fail in lubrication (I live in a very dusty region).
Then a click sound showed up and started to get louder and louder. So I decided to open the DP and see what was happening.
I'm not a big photographer so the pictures I took are not good at all, but perhaps can help someone else.
After removing every screw I saw, I could open the unit, (and understood that only a few ones were necessary). Keys are mounted by pressure, so it is not very hard to remove them.
I discovered that the key strikes the hammer not directly but through some kind of polymer that works as shock absorber, this little piece of gum, (porous plastic, or whatever it is) has adhesive on both sides and is covered with a harder plastic ribbon not to being erosionated by the direct impact of keys.
Perhaps due to intensive use (?) this protectign strip migrated, leaving the softer material exposed to all my virtuosity.
As I have no way of getting parts from Kawai (in fact I did not try... James?) I decided that the best option was to stick the damping piece of gum in other position and put the protecting plastic in the correct place.
(this one of course, is taken from Kawaius.com)
(notice the displacement of the transparent piece of plastic, and the dust)
Now the click has gone, the key repeats as fast as any other, and I hope it will last some time...
This is all, forgive my poor English!