What do I need to fix my oil leaks?

[Bryanj]

It would be better to replace the base gasket and O rings now as they will only leak later

[Drew400]

Thanks BryanJ. I guessed as much, but always nice to hear from a real expert! Cheers, D.

[Bryanj]

Is that ex as in used to be and spurt as in drip under pressure?
Following a few threads on the board it would probably be best to check the rings anyway

[Drew400]

Ha ha, quite so! 

[Drew400]

Now fitting a new genuine Honda cylinder base gasket.

Is there any reason why it's green on one side and blue on the other (i.e. does it matter which way up it goes, as it fits properly both ways up)?

Ta, D.