The Screw-washer,4x12 is the most widely applied product in the CB250RS 1982 (C) BELGIUM METER - KEY SET ( six times ).
The Meter - Key Set assembly is constructed from several parts from which the Speedometer Assy is the most expensive.
Some items from this specific schematic: Cable,tach,inner, Bolt,flange,6x25, Rubber,meter Mtg., Cord Assy.,pilot.