Yamaha hammer flange cords were originally made with a silk thread that became fragile over time and broke. Now they use nylon for their repetition cords, but most pre-’85 pianos will need replacement cords. There are two types of flange - one is attached with a center pin, one is attached with a screw. You’ll need some very basic pinning skills to replace the flanges that are pinned, but the correct size pin comes with the flange from Yamaha. The flanges with screws are much easier to replace.
How to Replace a Yamaha Hammer Flange
Updated: Aug 2, 2023