Highly irritating

[Rachmanoinoff]

Yeah...

My Kawai upright is making all these "rattling" noises.... it really bothers me.  Any tips?  It's coming from the little thing where you put your music, but no matter how much I tighten the screws, the noise won't stop!

Argh!

[tosca1]

Could it be the keyboard lid or drop which of course rests against the piano when open and is often a cause of unwanted  vibrations
and rattles when you play?  Often the rattle is caused by  a sympathetic vibration where wood is lightly touching wood. Try to track it down.  

Cheers!
Robert.

[Brian Lawson, RPT]

If you've tightened the screws so much and still there is a rattle, take the "thing" off and then see what is still rattling.

[classicarts]

I suggest you take the lids and covers off, one piece at a time.   In most of these cases, the noise is from sympathetic vibrations that is caused by loose screws. 
give that a try. Shouldn't be a major problem.

[sonatainfsharp]

Hehe, my Kawaii upright has buzzed since the day it was born. Usually hitting the fallboard takes care of it. Once I would find the buzz, the weather would change and a new one would start.

Glad to see I am not the only one with this issue.