Kawai KG3 key weight

For goodness' sake!!!!! Stop, because that way you only cause damage. Wait for the advice of the experts.

Simone preceded me. Thank you. Naturally, one must carefully check all the mechanics and verify friction. I think I have made a tutorial on the subject. Absolutely no lubricants should be used!!!!!! Instead, it must be examined closely and it must be evaluated whether the mechanical pins need to be replaced. That is the only solution. Obviously, the pins must be slightly oversized and the gasketed holes must be bored with straight reamers, otherwise there will be poor "firmness of the mechanical parts" (stiletto, capstan, escapement upright). Assuming this is the reason, the keyboard weighting and any other parts that produce friction between them must subsequently be rechecked. By re-evaluating the correct downward and return weight, it is possible, on some models, to still intervene with other balancing procedures. It is absolutely against common sense to counterbalance the keyboard before having eliminated excessive friction. In any case, the piano must be examined closely and appropriate measurements must be taken by disassembling a few parts as samples.