Where is the rest of your story?
From: a fellow RD400 re-builder.
One of the first things I found when I started cleaning the oily, dirty, spider infested parts resting in a plastic ice cream container was a piston with the skirt broken off.
I left it at that point for a few months. Bit scared what else I may find.
Anyway, I'm getting back into it. The frame, swing arm and steering head are done. I've bought a set of period looking new shocks and am waiting on bearings etc so I can put the first few pieces together. Nothing terribly exciting at this stage.
So, long way of saying, I want to read what you've done, what you had to change and what you've learnt.....