Take the tank off to get at the rear ones - disconnect the fuel gauge sender, the petrol pipe and the bracket holding the cables to the fuel tap drum in order to remove them; the tank can then be lifted off.
To get at the front plugs take the side fairing panels off and undo the bolt holding the radiator stay to the head: swing the radiator forward. You will then be able to get the spark plug socket provided in the tool kit into place over the left plug - just!
The right plug is much more difficult as the plug spanner interferes with the fan housing: you simply have to force the radiator forward as far as you dare and try and force the end of the spanner past it - my radiator bends while I am doing this - it's a real pig and I always feel that it's touch and go as to whether I brake the radiator or not. I wonder if anyone at Honda ever tried this on the prototypes! (mine is a 1990 FL).
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