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1973 Honda CB450K Brake-Light Wiring & Switch Comparisons

Identify the stop-light component being renewed on your 1973 CB450K before selecting a switch or wiring section. The rear switch, threaded front hydraulic switch and front sub-harness describe different repairs. Compare the actual control, attachment and termination at the location being serviced.

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Honda CB750 CB550 CB500 CB450 CB400 rear brake light switch

Honda CB Rear Brake Light Switch

$10.33 USD
12-0008
Replace your rear brake light switch with this Rear Brake Light Stop Switch. Exceptionally broad fitment across the SOHC CB750 lineup and virtually the...
Honda CB750 CB550 CB500 hydraulic stop light switch 35350-300-006

Honda CB Hydraulic Stop Light Switch ~ Replaces 35350-300-006

$24.95 USD
29-7021
Replace your hydraulic brake light switch with this Hydraulic Brake Light / Stop Switch, replacing OEM #35350-300-006 / #35350-300-016. 10mm x M1.25 thread.Key Features•...
Honda CB550 CB500 front brake light switch sub harness 35345-319-000

Honda CB Front Brake Light Switch Sub Harness ~ Replaces 35345-319-000

$7.00 USD
73-0104
Replace your front stop switch sub harness with this Front Stop / Brake Switch Sub Harness, replacing OEM #35345-319-000.Key Features• Front stop / brake...
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1973 Honda CB450K · Switches & Sensors Buying guide

Choose the replacement for the identified stop-light location

The rear product is a brake-light stop switch. The front hydraulic switch lists a 10mm × 1.25 thread and references 35350-300-006 / 35350-300-016. Front sub-harness 35345-319-000 addresses switch wiring. Each needs comparison with the control or connection retained at that location.

Parts to consider

Honda CB Rear Brake Light Switch Rear brake-light stop-switch replacementRear switch listed for the CB450K application. Compare the existing mounting and wiring termination before choosing it, particularly with changed rear controls. The description does not provide a complete mounting drawing or numerical lead length.View part Honda CB Hydraulic Stop Light Switch ~ Replaces 35350-300-006 Threaded front hydraulic stop-light switchFront hydraulic brake-light switch references 35350-300-006 / 35350-300-016 with a 10mm × 1.25 thread. Compare the fitted port and wiring; confirm any further sealing or attachment details needed by a replacement hydraulic arrangement.View part Honda CB Front Brake Light Switch Sub Harness ~ Replaces 35345-319-000 Separate front switch wiring componentSub-harness referencing 35345-319-000, described for the front stop/brake switch. Match the switch-side and retained-loom terminations. The wiring description does not itemize a supplied switch or a complete motorcycle loom.View part

Use the hydraulic thread as one compatibility check

The stated 10mm × 1.25 thread identifies the switch attachment, but a changed hydraulic component may need additional port, sealing and electrical details. Compare the actual fitting and confirm missing specifications. The common motorcycle application does not document every custom hydraulic connection.

Separate switch condition from the connection being replaced

Inspect the switch and wiring section independently when identifying the repair. The front sub-harness renews a particular connection path without itemizing the switch. If both need replacement, match each to its own location and attachment rather than treating one purchase as a combined switch-and-wire kit.

Brake-light location and interface questions

What should I verify for a hydraulic switch on a replacement fitting?

Compare the stated 10mm × 1.25 thread with that fitting, then establish the necessary sealing and electrical connections. The description supplies references 35350-300-006 / 35350-300-016, without a full port or termination drawing for every changed arrangement.

How can I check the rear switch after the rear control was altered?

Identify the retained switch mounting and operating arrangement, then compare the wiring connection and required reach. The rear-switch description gives no complete dimensional drawing. Confirm the missing details needed by the changed control before choosing the replacement.

What if the switch end fits but the main-wiring connector differs?

Check the sub-harness at both ends before ordering. A matching switch connection does not establish the altered main-wiring termination. Confirm the connector layout and any missing dimensions required by that wiring repair; the listing does not supply a full pin diagram.

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