Broke bolt off in the head.

[gypsyspit]

So ive been in the process of stripping down my bike for that rat bob kinda look. I removed the cylinder heads, and I was in the process of removing their brackets when. I turned the bolt on the left side on the bike, the right bolt to the bracket. I broke the bolt clean off. My question being. For a lack of better words... How screwed might I be? My bike fired right up as normal. Attached is a picture.. Note my head gasket has been leaking... the mechanic that installed my tires said it runs great, but needs taken care of at some point..