TurboXS dualstage MBC question, what is this side valve? pics

[jaydm16]

http://www.turboxs.com/uploaded_images/211.jpg

What is the side valve do? It is the big gold valve and i cant figure out what mine does. :aigo:

 

[z1turbo]

The bronze valve is for coarse adjustment and the adjustment on top is for fine adjusting.