I have a '77 FXE. I have a slow leak in the primary. I looked everywhere for a source and it appears to be coming from a small allen-headed screw on the back side of the primary just on the other side of the drain plug. Why is it there? I can't find it on any diagrams...

 

I've looked at every inner primary image I can, and I don't see any of them with that extra hole.

This might be of help tho:
http://www.justanswer.com/uploads/ha...Breather_1.jpg

Maybe someone disconnected one of those lines and plugged it?

 

It's a shovel.....it's supposed to leak

 

You may get more and better responses if you post this in the Shovelhead Forum under the Classic listing ... ask those that have and ride Shovels ... just saying