Has anyone noticed if the tach cable leaks? I have replaced the top seal last time I took the head apart, now I am thinking that maybe i picked up the wrong cable, and that leak there, may be caused by the wrong tach cable? In 2010 when I had the front suspension done (finished) I picked up a tach cable from that place. I don't think it was specific to the XS400 or not, just that it was a close match to the cable I was needing. That was 6 years ago, so I don't quite remember anymore.
Tobie
Tobie