I see what your talking about. Here is a head for a 6g. See the small hole near the center of the valve just below the manifold bolts....
It is a machined port and yes i have seen it on the 5th gens. Infact while at the shop I pointed it out on a 5g. When he called Honda they told...
So I am the only owner of 26k mile 2004 vfr800. Recently i was riding and while at a stop noticed not only did the idle seem rough but the sound...
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