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1981 Honda CB900C Custom Brake Switches & Sensor Leads

Diagnose the circuit before choosing a switch or sensor connection for your 1981 CB900C Custom. The front brake-light switch, spring-equipped stop switch and air-sensor lead are different products. Compare the installed controls and terminals, particularly where earlier repairs changed wiring or mounting arrangements.

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Honda CB900 CB750 CB650 CB550 CB500 oil pressure switch 37240-P13-013

Honda CB Oil Pressure Switch ~ Replaces 37240-P13-013

$23.95 USD
73-0825
Replace your oil pressure switch with this Oil Pressure Switch, replacing OEM #37240-P13-013.Key Features• Oil pressure switch• Replaces OEM #37240-P13-013• Honda part name: Switch...
Honda CB900 CB750 CB650 CB400 front brake light switch 35340-422-013

Honda CB900 / CB750 / CB650 / CB400 Front Brake Light Switch ~ Replaces 35340-422-013

$14.95 USD
12-0003
Fit the earlier DOHC CB's front brake light switch with this Front Brake Stop Switch, replacing OEM #35340-422-013. Fits the 1979-80 CB750 range, CB900C,...
Honda CB1100 CB1000 clutch lever brake light switch 35330-413-003

Honda CB Clutch Lever Brake Light Switch ~ Replaces 35330-413-003

$15.95 USD
29-7029
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...
Honda CB900C air sensor sub wire with rubber 32111-463-000

1980-82 Honda CB900C Air Sensor Sub Wire With Rubber ~ Replaces 32111-463-000

$14.95 USD
73-0908
Replace your air sensor sub wire with this Air Sensor Sub Wire with Rubber Cover, the wire that connects to and covers the air...
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Honda CB1000C CB900C rear brake light switch spring 35357-MA2-610

1980-83 Honda CB1000C / CB900C Rear Brake Light Switch Spring ~ Replaces 35357-MA2-610

$8.19 $7.87 USD
You save $0.32
73-0849
Replace your rear brake stop switch spring with this Rear Brake Light Stop Switch Spring. This is the spring that attaches to the rear...
New
Honda CB900C stop switch assembly 35350-166-005

1980-82 Honda CB900C Stop Switch Assembly ~ Replaces 35350-166-005

$17.57 USD
07-4621
Replace a worn brake stop switch with this Stop Switch Assembly, complete with spring. A direct replacement for OEM #35350-166-005, fitting the CB900C Custom.Key...
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1981 Honda CB900C Custom · Brake Switches & Sensor Leads Buying guide

Identify what the switch actually controls

Brake-light switches, the oil-pressure warning switch and the suspension air-sensor lead serve different circuits. Trace the symptom to the correct component before ordering a similarly named switch or wire.

Parts to consider

Honda CB900 / CB750 / CB650 / CB400 Front Brake Light Switch ~ Replaces 35340-422-013 Front brake-light switchFront brake stop switch replacing reference 35340-422-013, with a 1980–81 CB900C Custom application.View part 1980-82 Honda CB900C Stop Switch Assembly ~ Replaces 35350-166-005 Rear brake-light switch with springPedal-operated rear stop switch with spring; reference 35350-166-005 for the 1980–82 Custom.View part 1980-82 Honda CB900C Air Sensor Sub Wire With Rubber ~ Replaces 32111-463-000 Air-sensor sub-wire and coverShort connecting wire and rubber cover for the suspension air-sensor circuit; reference 32111-463-000. Sensor not included.View part

Related parts: Oil-pressure warning switch

Separate the front and rear brake switches

The featured front switch references 35340-422-013 for the 1980–81 Custom. The spring-operated switch referencing 35350-166-005 serves the rear brake pedal. Check switch operation, mounting and adjustment as well as lamp power and wiring.

Keep warning and safety circuits intact

The air-sensor item is a connecting wire and cover for the suspension warning circuit, not a replacement sensor. The oil switch operates a warning circuit rather than displaying oil pressure. A clutch-lever safety switch belongs to the starter interlock; it is not a brake-light switch and should not be bypassed to conceal a starting fault.

Practical questions

Why does the brake light work from the pedal but not the hand lever?

Because the two controls have separate switches. Check the front switch’s actuation and continuity, then its connections and wiring. The working rear circuit helps narrow the fault, but does not establish that the front switch alone is bad.

Should I replace the oil-pressure switch if its light stays on while running?

Stop the engine and investigate the oil level, actual oil pressure and warning circuit using the service procedure. A new switch cannot correct a real lubrication fault.

Does the air-sensor lead include a new sensor?

No. It supplies the connecting wire and rubber cover. Check the existing sensor and its connections separately so you replace the failed component rather than an undamaged lead.

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