Fse400 lower oil line
 

Okay FSE400 guys,
On the lower side of the right case there is a dual port oil line with one having a spring and bearing. Which one does the spring and bearing go in and which goes in first, the spring or the bearing?, and it goes in the upper or the lower oil hole??

The parts schematic shows the ball first, then the spring.

Select your bike , go to exploded view.
https://gasgas.com/us/manuals