1985-1986 Honda ATC250R Shop Manual, Page 229Get this manual
ELECTRICAL SYSTEM '85:
DIMMER SWITCH LIGHTING SWITCH
SWITCHES
Engine stop switch, lighting switch and dimmer switch must be replaced as an assemblyRemove the headlight case and disconnect the engine stop switchlighting switch wire coupler and connectorContinuity should exist between the color coded wires in each chart
ENGINE STOP SWITCH AFTER '85: ENGINE STOP SWITCH LIGHTING SWITCH