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YDS-150/120 Dissection & Octave switch modification

Updated: Nov 25, 2023

I was thinking of improving YDS octave switch function/sensitivity as orginal octave switch can be inaccurate or sluggish when fast ocatve change is needed. First I was looking for guidance on how to dissemble YDS-150/120. I found one at youtube.

Here is my final modification of the octave keys- more accurate and faster octave changes. Without moving the thumb widely, I can change octave up and down easily and instantly.

After testing for a while, this is my my final modification. I am very happy with this.

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