Abstract: A fuel tank for a motorcycle. The tank is made of an inner member and an outer member which form between them an inverted U-shaped space for containing fuel. The members are continuously joined to form the space by a welded seam. The members are joined at a seam which is located at both of their edges, except where an extension of one projects beyond the edge of the other to form a rear stay. The edge of said other member at the extension is welded directly to the extension, rather than to its edge. A rib can be formed integrally with the extension to reinforce it.