Check out any of the eighteen Gasket Kit B components enlisted.
Of all the components used in this assembly the Gasket Kit B is the most expensive.
Parts such as the Gasket Kit B: O-ring,6x1.7, Gasket,crankcase (mca), Gasket Crank Case (nas), O Ring 107x2 are included in the Z50r 1989 (k) Usa Gasket Kit B parts fiche.