The O-ring 13.8x2.4 is the most widely applied product in the VFR750R RC30 1988 (J) ENGLAND FRONT FORK ( four times ).
The Front Fork is made up of components including this Fork Assy.,r.fr.( which is the most expensive.
thirty components are shown in this Vfr750r Rc30 1988 (j) England Front Fork exploded diagram.