Yamaha Tyros Encoder Knob

Yamaha YPG-235/535 Volume Knob (Also fits many others)

Yamaha Tyros/Genos Key

YAMAHA PSR-21 Keyboard Parts ON/OFF Button Cap Volume Knob Slider [Select Part]

YAMAHA PSR-15 Vintage Keyboard OEM Parts: Volume Slider Gray Tip Cover Cap Knob

For Yamaha DX7 MK1 DX9 DX5 DX1 DX21 DX27 DX100 Slider Knob 3x Volume/Data Entry

YAMAHA YPT-270 Keyboard Used Part: Volume Pot Knob Potentiometer Circuit Board