Hey. I'm sitting here doing a gravity brake fluid change and getting a fairly continuous stream of bubbles out of the calpier. Emptied caliper with turkey baster. Didn't step on brakes at all. Filled resivoire with fluid before starting.

Thought
? Next step?

 

I can't tell from the picture since it is pretty dark but I've had this happen if my hose is not perfectly set onto the bleeder. It would just allow air from the atmosphere to join the flow of the brake fluid.

 

Good call. Changed gear around and it stopped. Thanks.