Spot on Biggles, Well done!
i used a fantastic, clever screw extractor made by "Grabbit" (available @ bunnings $32.00) to remove them.
They are NOT philips head scews but J.I.S. (Japanese industry standard) design and can be easily destroyed if a regular philips driver is used...
btw, the hints in the photos were: 8 pc's shown (4 air intake funnels) and the picture of a stripped out head, to demonstrate how tight Honda torqued them down for no real reason
Your turn now!