Hi Rogerio: You didn't mention backchecking. If this is approximately 14 to 16 mm, then I would think that the problem is in tightness of the flange pinning. If you remove a hammer flange, the hammer and shank should swing about 6 or 7 half swings before coming to rest after being dropped from a horizontal orientation to the flange. If it is less, then probably some repinning is in order. You can also check the wippen flange for tightness by placing a penny (3 grams) weight near the end of the flange when the removed wippen assembly is held up on end. If this requires more than 5 grams to move the flange, then again repinning or shrinking is in order. You also did not mention the keybushings or the key balance bottom hole. These can also be a source of resistance. Jim Coleman, Sr. On Tue, 1 Dec 1998, Rogerio Cunha wrote: > I am with a great problem with a YAMAHA grand model G2 and I need help. > All the measures that I did on it I think that they are very good : = > hammer weight, letoff, drop off, the jacks are correctly under the = > knuckles, key deep etc., etc. but the repetition is poor ! > The friction is very good ( I used powder micro Teflon).The repetition = > springs are good. > There are a problem : I haven't the Yamaha measurements and I used the = > relation key deep-hammer travel 1:5. > What can I do in order to increase the repetition that is poor. > Rogerio Cunha - IC Member of the Guild. > >
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