Barton Sprint 50 – Beginner’s question and loose hose

Hello, I have my first moped a Barton Sprint 50 and real beginner questions. Can you tell me exactly what can be seen in the pictures? I have given some numbers: And then I noticed a tube that hangs loosely in the “space”. But it is a clamp on it. But find nothing on which the one could have been attached. Does anyone have an idea? For a short time the performance has broken in. Maybe this is related to the hose? I quote myself from another n Beitrag: Quotation: The moped probably too, because that didn’t want to do it today. As if it didn’t take gas at all. Even on the straight road did not go faster than 35 km/h. Then was the end… at full speed. On a small climb I even stopped. Then I had to drive in the first gear and push with it, otherwise nothing would have happened. As I said, I am a beginner and have no idea. The next workshop I could go to is 50km away. Thank you 😉