Valve Clearance Check

[dickturpin]

I want to do a valve clearance check....something I have never done before. (Bike now done 26k miles).
I have looked at the service manual and want to have a go myself but just wonder about a couple of things.
Is access easy enough? The AIS is removed.
Will I need new gaskets?
How long should it take me?....Oh, that's three things!

Anything else for a 'first timer'?

Thanks

D