On my YS170 DZ the prop drive washer is placed 1mm further out on the shaft compared to my YS160. Se attached picture. The 2mm gap on the 170 used to be 1mm on the 160. I understand this is normal on the 170, but why did Yamada do this change? I’m curious

I find it a little bit annoying since on my model, when replacing the 160 with the 170, the spinner gap becomes 1mm bigger and it just does not look as good as before.

David