verslagen1 wrote on 05/13/17 at 19:33:03:O, G, there used to be something there, but now it's gone... what was it?
I'm a newb here, but verslagen1 made a hint, so I'm going to make a beginners guess...The battery?
I have read about breather hoses on batteries, but when I took my battery out, I didn't notice any hose coming out of it... but maybe the OP's battery had one.
Am I getting warmer?
Edit: Oops, someone already gave the answer... an "atmospheric vent" for the stock battery (which sound like a more professional way of referring to a breather hose)... darn, and I thought I was being smart!
That begs the question... why some batteries use vents, and some don't? What are the benefits and disadvantages of either? And how that affects me working on my bike? G*d... so much to google... so little time.