Some items from this specific schematic: Oil Seal 12x18x5, Oil Seal,35x52x7, Gasket,r.crankcas (nas), Oil Seal,22x31x5.
The O Ring 6x3 is the most widely applied product in the CB250 TWO FIFTY 1992 (N) ENGLAND / MPH GASKET KIT B ( two times ).
Of all the components used in this assembly the Gasket Kit B (nas) is the most expensive.