Check out any of the eighteen Gasket Kit A (except Vt1100cw/c2w) components enlisted.
A sample from the products for the Gasket Kit A (except Vt1100cw/c2w) include: O-ring, O-ring,21.6x2, O-ring,27.4x2.4, Seal,valve Stem.
On this parts fiche the Seal,valve Stem is the most specified component.