Hi, about a month ago I started fixing an old piaggio si that my grandparents had in there farm. I’m really near the end but a new problem has arose. The drive belt, that previously had moved freely in tandem with the rear wheel hub has stopped spinning with it but it does move freely when I manually spin the variator. Another detail is that the drive belt isn’t flush and at the top of the rear pulley. Finally, when I move fast enough with the moped the back wheel sort of gets stuck but at the same time the drive belt and the rear wheel unit do move in tandem.
If any body has any suggestions they would be greatly appreciated!