What connects to this?
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#2
I'm pretty sure what you have circled there are the air vent pipes. They just connect to rubber tubes that don't connect to anything at the other end. To the best of my knowledge they are just drain tubes. I have heard of them venting gas when there is a problem with the floats in the carb bowls. You should be able to start the bike with out the tubes attached but if something is clogging one of the air vents then that might be a problem.