Hi Dastardly, thanks for the tip but I resolved the situation.
My bike is a 2008 ZX14 (not an R) and the bolts for the header mounts are actually fixed studs and don't come out (at least I don't see how they would--I thought I was missing a bolt at first but this proved to be wrong as the mounting gasket fixture was pushing outward and away from the engine and obscured view of the bolt from the angle I was looking), so all I needed was a flanged #12 (12mm) nut and the issue was solved.
That being said, wow, almost all the mounting nuts on all my headers were loose! Good grief. But they are all nice and tight now. :-)
2008 ZX-14 Ninja
1984 ZX-900A1 Ninja
1985 ZX-600A1 Ninja
Last edited by Vulfie; 03-31-2016 at 11:11 AM.