<HTML><BODY BGCOLOR="#ffffff">Scott, I don't think your problem with bobbling hammers is friction related, bu= t it sounds like the keys need easing, and the keypins could probably use a =  possible polishing and lube with a dry lube, such as McLube. Bobbling hammers are frequently caused by letoff being to close.  3= /8 inch is nowhere near being too close to the string. The most common cause for bobbling hammers in Yamahas I've found in rece= nt times is broken hammer-return spring cords.  These are the loops tha= t hold the hammer spring taut to aid hammer return.  Could be several a= re broken, and if that's the case, they are all on the way to disintegration= .  There is a fix for it that has been posted in recent times.   Check it out and let us know what's up. Dave Stahl In a message dated 12/15/04 9:05:59 PM Pacific Standard Time, Sspeev@aol= .com writes: <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-= LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">  Hello everyone. This= is my first post, so please excuse any idiomatic slip-ups on my part. Just recently I began learning how to tune, regulate, and repair (by way= of apprenticeship).  Before any of this, though, I'd been aware of som= e bubbling notes on my yamaha p-22.  And so recently i set out to corre= ct the problem, which pervades the mid-range of the keyboard.  Here's w= hat I did: --closed up the hammer-travel distance to 1 3/4" (from 1 7/8").  &n= bsp; --removed the thinner front rail paper punchings (making the key dip abo= ut 7/16") --taken out lost motion --regulated aftertouch so that jack just clears hammer butt Also--and this was a few weeks back, before dealing with the bobbling ha= mmers--I regulated the let-off so that the jack tripped when the hammer was = within 3/8" from string. In retrospect, i wonder if this served to exacerbat= e the pre-existing problem.  Anyway,  the bobbling is not always r= eadily apparent.  Sometimes you can only feel it (and not hear it) duri= ng aftertouch.  Regardless, it's making the touch feel weird, and piani= ssimo nearly impossible.   One last thing:  many of the keys seem to have a lot of friction to= them.  I don't know whether this tightness has to do with the front ra= il or balance rail bushings.  Either way, it's quite difficult to remov= e any given key from out of its pins.   Does anyone think, then, that this whole thing could be friction-related= ? </BLOCKQUOTE> </HTML>