I should imagine that it probably was a little air in the filter housing which has bled itself out whilst the bike had been standing and cleared when you started it today. Just keep an eye on the levels for a day or two.

As for the dents, it's a shame and I can understand why you'd be upset, but they all seem to have something not quite right about them! Mine has a patch of splatter from the weld just below where your dents are. I thought it was bad when I noticed it, but it's all but forgotten now amongst the other scratches and dings here and there. Think of your dents as a birth mark, like my chicken sh!t welding, a little genetic abnormality that makes your bike a little bit different.

Nice bike BTW.

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