Reamer Size

Have a new set of valve guides and valves.The guides need reaming. Honda tech manual says 5.475-5.485mm or 0.2156 0.2159ins. Seems a funny size. I have seen advertised on the internet the "Correct" Honda tool set at 5.5 ins. Any comments.
Cheers,
Pete.

My fault, obviously the last line should read 5.5mm.
Pete.

Problem solved, well done!

HI Wanus. So I can get away with reaming the guides at 5.5mm? If that is so, thanks for the info.
Regards,
Pete.

Sorry mate... I was only referring to the reading/writing mistake you made.
If that is the original Honda tool for the head, I would use that one.

My guess would be that 5.475-5.485mm is the correct fabrication diameter.
5.5mm would be the 'commercial' notation.