With five applications this O-ring,12.1x1.9 is the most specified part.
Parts such as the Gasket Kit B: Washer,sealing,10, O Ring 7.3x2.2, Gasket,water Pump, O-ring,47.5x2 are included in the Rvf750r Rc45 1994 (r) Usa Gasket Kit B parts fiche.
The Gasket Kit B assembly is constructed from several parts from which the Gasket Kit B (nas) is the most expensive.