For 2008 Peugeot vivacity scooter, 50cc, 1 cyl, 2strokes(2-T), what spare parts do I need to replace, because recently it is starting to emit black smoke. Bought it new in 2008. The oil pump is also starting to leak. What should I do? I shipped it to Africa, Eritrea to use it there during my long vacations. Thanks for your advice. Zeray.