Have just got mine back from its first service. I pointed out to them the squeak that was very apparent when walking the bike around.
It seems it was the suspension and not the swingarm. What they reckoned was that the bush at the top and bottom are attached was done too tightly. Anyway they have freed it up, and added a bit of the greasy stuff, which up to now seems to have resolved it.
Hope this may point you in the right dirction Irfuel.