The oil-pressure switch and rear brake-light switch serve different circuits on a 1981 CB650C. Identify the fault and the relevant mounting point before ordering. A warning light or stop-light problem needs its own diagnosis rather than a replacement chosen from similar-looking electrical fittings.
Replace your front clutch lever safety stop switch with this Clutch Lever Stop Switch, replacing OEM #35330-413-003. This is the switch that allows the...
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Restore reliable brake light activation with this Rear Stop Light Switch, designed as a direct replacement for several original Honda rear brake switches. This...
The oil-pressure switch replaces reference 37240-P13-013, while the rear stop-light switch is operated from the brake-pedal system. Confirm the actual component and connectors before selecting either replacement.
The oil-pressure switch is an electrical component, not proof that the engine’s oil pressure is correct. Use the proper diagnostic procedure to distinguish a switch or wiring fault from an actual lubrication problem before deciding that a replacement switch addresses the warning. If the oil-pressure warning stays on with the engine running, stop the engine and have actual oil pressure checked before riding.
Check rear brake-light operation separately
The rear switch responds to the pedal-operated brake circuit. Compare its mounting and connectors with the fitted parts, then follow the service procedure for adjustment and a function check. A changed pedal or linkage can affect the operating arrangement.
Oil & Rear Brake Switches questions
Does an oil warning prove the switch is defective?
No. Use the correct checks for the warning circuit and the engine’s actual lubrication condition. Do not assume replacing the electrical switch resolves an oil-pressure problem.
Will the rear switch fit modified pedal controls?
Compare the switch mounting and operation with those controls before ordering. The model application supports the listed arrangement but does not verify every custom pedal or linkage.
Which check comes before selecting a replacement?
Identify the circuit and compare the fitted component’s reference and connections. Test the wiring and operation according to the appropriate service information so the order addresses the diagnosed fault.
Not sure which part you need?
Send your model and year, plus photos of your existing part and any changes to the original setup.