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1984 Honda CB650SC Nighthawk Control & Oil-Pressure Switches

A rear brake-light fault, clutch control switch fault and oil-pressure warning require different checks on the 1984 CB650SC. Identify the circuit and fitted switch before ordering. Their locations, operating mechanisms and electrical connections should be compared separately, even when the symptoms appear at the instrument panel.

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Honda CB1100 CB1000 CB900 CB750 rear brake light switch 35350-KA2-405

Honda CB Rear Brake Light Switch ~ Replaces 35350-KA2-405

$22.18 USD
33-0024
Ensure your brake light activates properly with this Rear Stop Light Switch, designed as a direct replacement for several original Honda rear brake switches....
Honda CB1100 CB1000 CB700 CB650 CB550 oil pressure switch

Honda CB Oil Pressure Switch ~ Genuine Honda OEM

$69.95 USD
99-5094
Upgrade or restore your classic Honda motorcycle with this Genuine Honda Oil Pressure Switch — precision‑engineered and made in Japan. This authentic replacement part...
New
Honda CB1000 CB700 CB650 CB550 clutch lever switch 35330-MB0-003

Honda CB1000 / CB700 / CB650 / CB550 Clutch Lever Switch ~ Replaces 35330-MB0-003

$16.38 USD
29-0085
Replace your clutch lever switch with this Clutch Lever Switch, replacing OEM #35330-MB0-003.Key Features• Clutch lever switch• Replaces OEM #35330-MB0-003• Honda part name: Switch...
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1984 Honda CB650SC Nighthawk · Control & Oil-Pressure Switches Buying guide

Match the switch to its control or warning circuit

The rear pedal switch operates the brake light, the clutch-lever switch supplies the starting-interlock signal, and the genuine Honda oil-pressure switch serves its warning circuit. Use the correct tests before deciding which component needs replacement.

Parts to consider

Honda CB1000 / CB700 / CB650 / CB550 Clutch Lever Switch ~ Replaces 35330-MB0-003 Clutch starting-interlock switchStarting-interlock switch at the clutch lever, replacing reference 35330-MB0-003.View part Honda CB Rear Brake Light Switch ~ Replaces 35350-KA2-405 Rear brake-light switchPedal-operated stop-light switch with a verified 1983–85 CB650SC application.View part Honda CB Oil Pressure Switch ~ Genuine Honda OEM Honda oil-pressure switchGenuine Honda oil-pressure switch with a listed 1983–85 CB650SC application.View part

Check the control-end details

The clutch-lever switch provides the starting-interlock signal and uses reference 35330-MB0-003. The rear stop-light switch is operated by the rear brake pedal. Compare their connectors and mounting separately; a replacement control housing or altered wiring can require a different switch application.

An oil warning needs diagnosis

The selected oil-pressure switch is described as genuine Honda and lists the later CB650SC. Do not assume the switch alone explains a warning. Follow the correct pressure checks or use qualified help before deciding on replacement and returning the engine to service. If the oil-pressure warning stays on with the engine running, stop the engine and have actual oil pressure checked before riding.

Control & Oil-Pressure Switches questions

What identifies the clutch lever switch?

The selected component replaces reference 35330-MB0-003. Compare its mounting and connection with the switch at the fitted clutch control before placing the order.

What should I compare for the rear stop-light switch?

Check the pedal-operated mechanism, mounting and electrical connector. The later-CB650SC application supports the original arrangement, but changed controls and wiring need a direct comparison.

Is the oil-pressure switch genuine Honda or a replica?

The selected product is described as genuine Honda. Confirm its listed replacement references and the fitted connection as part of the repair diagnosis before choosing it.

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