Six kids... bloody hell, three were enough to virtually wipe me out.
If it's been stood for a while, you could clean out the carbs, pilot jets and fine drillings, they can get gummed up in my experience.
However if you taken it out on the road and goes O.K. don't bother.
You could grease the back shock linkage and swinging arm.
And check the plug colour, seeing as it's got replacement downpipes.
If the plugs are white the link pipe may need sleeving down, I think mine was a Motad one, and I had to sleeve it down.