YAMAHA P-125 Digital Piano Keys Sticking

GHS Individual Replacement Key

The P-125 uses a cantilevered plastic hinge. Over time or under heavy use, the rear plastic pivot point can develop stress fractures or warping, causing the key to bind against the frame or adjacent keys. Replacing the individual key or the specific key block restores the original mechanical geometry and clearance.

SKU: WU445100

Yamaha G-1066 Damping Grease

The GHS action relies on high-viscosity silicone-based grease to provide damping and reduce friction at the guide pins. If this grease migrates away from the contact points or becomes contaminated with dust, it creates 'stiction,' where the key physically adheres to the guide rail and fails to return to its neutral position.

GHS Hammer Assembly

Below each key is a weighted metal lever (the hammer) that provides the 'weighted' feel. If the unit is subjected to impact or inverted during transit, these hammers can jump out of their retention clips, causing them to wedge against the internal chassis and physically jam the key's travel.