When giving the bike a thorough cleaning, I came across this thing (it has a hose running out of it) under the bags behind the rear wheel... (What is it?)

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Also, I noticed a bump stop on the swingarm that looks like it has contacted the frame. This pic is not great, but I was hoping someone could check their bike to see if they see the same thing. The question is: Should I bump up the preload on the rear shock? I cannot remember bottoming out. I guess I am just being cautious. (It is that little round spot just beside the brake bleeder valve in the lower left of the pic.)

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