I have been trying to figure out what size the clutch cable hole on the primary is and I found 5/16 24. I was not able to definitively confirm this so far.
My goal is to build a hydraulic clutch system. I know there are already kits out there but I prefer the DIY direction. I just like to mod my stuff.
Trying to find the size of the bolt hole or a compatible slave cylinder for our bikes is my first step. I will drill and tap the clutch cable hole if I just can't find anything compatible.

Any other tips you might have would be great. I appreciate all the help I can get!!