Moin, have dismantled my scooter ,REX RS 500 QM50QT-6A/25″ because the frame should be painted. Now I can’t remember where the long hose that is located at the top of the petrol tank should go, about 5-7 cm further to the middle of cable of the level sensor. The free end, about 1 cm, is slightly softer than the rest, as if it were immersed in a solvent, so it was also connected somewhere. By the way, around the tank opening is a “shell” that prevents Gasoline should fall on parts of the scooter when refueling. A hose can be connected to this “shell”, but I can’t imagine that the dust from the shell should get into the gas tap, so the mysterious hose should not be there either. I hope someone knows it and reveals it to me, thank you for it.