Clyde, Doing the same thing with the rest rail will also work. Just take up the lost motion. But also, be aware of what this might do to the damper lift. Avery At 06:38 AM 03/07/03 -0500, you wrote: >Tom, > >Before compromising the letoff that much, I would try to increase the key >dip by shimming up the balance rail - about the thickness of a business card. > >Jerry Gravina, RPT >Babylon, NY > > >At 12:06 AM 03/07/2003 -0500, you wrote: > >>List >> >> I recently serviced a U1 vertical for a first time client. >> Excellent piano very little wear and -tuned up quite well. >> >> I did however find lettoff to be over !/4 and inconsistent. >> >> I adjusted to 1/8 and took up lost motion. Tightened action >> screws. The key dip and after touch were sufficient, and the jacks are >> free to travel away from the butts---no interference from that >> adjustable rail (sorry, I forget Y s nomenclature on that component) >> >> My client has a light touch and the action still stutters >> >>I returned, shortened blow distance readjusted lost motion, and adjusted >>spoons to re-correct damper timing. >> >> My client called again with the same problem and called >> other technicians for advice also >> >> I know bobbling hammers can be a problem on Yamaha verticals >> and I ve worked on hundreds of these, but I can t shorten blow any more >> and as I mentioned, keydip-aftertouch are correct. I m hesitant to >> increase lettoff back to its original excessive amount, so esteemed >> colleagues ---Any suggestions? I m going back next week. >> >> P.S. Backchecks are also adjusted---I.E. catchers are not >> bouncing out or off of the backchecks >> >> Tom Driscoll RPT
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