Ed rode Bill Hagens former GRiSO down to my place today and when I went to reinstall a side wing the rubber expanion nut split . I looked in the parts diagrams and not sure about p/n any help appreciated
Commonly known as a 'Well Nut' they should be available at any good nut and bolt shop. They're M5 from memory. Piaggio will no doubt want a fortune for one. Our local fastener place I can get a bag of twenty for the same price!