If you are going in there, you might want the magic grease that the keyboard makers use on their plastic actions, if the CVP uses a plastic action? Some people have managed to get some from the manufacturers, others have used lithium (I think) grease. Worth a call into Yamaha I think with such a good model.
Grease for plastic is usually silicone based but if there is silicone rubber involved then a lithium based lubricant would be used. I will check with Yamaha like you say and see what they say. I haven't stripped the piano down yet as I would like to have it in bits for a short a time as possible hence my question about what to replace while i'm in there.
To be honest, I'd give Yamaha a call, explain the situation, and ask if they can recommend a technician to have the instrument serviced.
I checked with Yamaha and the nearest service centre is 600 miles away. I appreciate the advice, which I would give the same to anyone else, I am confident in my ability to replace these parts and restore the 407 to its original state. If I wasn't I wouldn't be taking the risk with such an expensive instrument.
Kind regards,
Mark
