SX900 keybed issue...

[rene1242]

Rene,

Thank you for the link.  So it's grease for many electronic devices with plastic gears, etc.

Joe H

That exactly right

[s_cristi]

Hi,
I just got back my PSR SX700 on Saturday from service - adding grease was Yamaha's treat, cost free while in 2year standard warranty.
I am the 2nd owner, bought SH from another country, but since I have the buying documents from the 1st owner there was no problem to obtain the repair acceptance from Yamaha

Maybe you should give it a try

BR

The clanky black keys issue is back 
I am thinking about buying grease and fix it myself this time.

[rene1242]

The clanky black keys issue is back 
I am thinking about buying grease and fix it myself this time.

I did it myself been using it for months now the issue is gone