YAMAHA Smax 155 Secondary Sliding Sheave Assembly / Black

There are 2 types of gaps for adjusting by riders requirement.
1. Increase speed changing stroke.
2. Make low speed power input early and extend end speed.

This is increasing stroke product, so it needs more space for working.
Suggest using ncy or original clutch housing.
If using other brand housing, just grind it when it is needed.