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1973 Honda CB450K Reflectors, Rubber Bases & Signal Seals

Identify the reflector support or signal seal being renewed on your 1973 CB450K. The reflector states a threaded attachment, its rubber base has a separate reference, and the gasket belongs to a particular lamp arrangement. Compare each with the components staying on the bike.

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Currently viewing Turn Signal Lamps, Stems, Lenses & Reflectors

Honda motorcycle parts

Choose your model and year to see parts listed for your bike.

Honda CB750 CB550 CB500 CB450 CB400 reflector 33741-340-670

Honda CB Stock Type Reflector ~ Replaces 33741-340-670

$21.46 USD
11-2303
Restore your mid-'70s Honda's stock reflectors with this Stock-Type Screw-On Reflector with a 6mm thread, replacing OEM #33741-340-670. Broad fitment covering the 1972-78 CB750...
Honda CB750 CB550 front reflector rubber base 33743-341-670

Honda CB Stock Type Front Reflector Rubber Base ~ Replaces 33743-341-670

$8.95 USD
11-2304
Fit the rubber base beneath your stock front reflector with this Stock-Type Front Reflector Rubber Base, replacing OEM #33743-341-670.Key Features• Stock-type front reflector rubber...
Honda CB750 CB500 CB450 CB400 turn signal lamp gasket 33443-268-671

Honda CB Turn Signal Lamp Gasket ~ Replaces 33443-268-671

$4.61 USD
11-2085
Service your early CB750 or classic twin turn signal with this Turn Signal Lamp Gasket, replacing OEM #33443-268-671. Pairs with our signal lens #11-2110...
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1973 Honda CB450K · Turn Signals & Reflectors Buying guide

Match supporting parts at their own attachment points

The stock-type reflector lists a 6mm thread and reference 33741-340-670. Rubber base 33743-341-670 is described beneath the front reflector. Signal gasket 33443-268-671 names companion lamp and lens products. These details support a focused comparison of reflectors, bases and seals.

Parts to consider

Honda CB Stock Type Reflector ~ Replaces 33741-340-670 Reflector with a 6mm threaded attachmentStock-type screw-on reflector referencing 33741-340-670. The description states a 6mm thread but does not give pitch, post length or full face dimensions. Compare the retained mounting and confirm any missing measurement needed by changed supports.View part Honda CB Stock Type Front Reflector Rubber Base ~ Replaces 33743-341-670 Rubber base beneath the front reflectorFront reflector base referencing Honda 33743-341-670. Match its location and shape to the retained reflector support. The written description identifies the rubber base without itemizing a reflector, mounting fastener or paired-base package.View part Honda CB Turn Signal Lamp Gasket ~ Replaces 33443-268-671 Seal for the identified signal-lamp arrangementGasket references 33443-268-671 and names specific companion signal lens and lamp products. Compare it with the housing and lens being kept, especially if earlier work changed the lamp. No complete gasket-dimension drawing is supplied.View part

Check post reach and clearance on a changed reflector support

The 6mm thread label does not settle the post length, pitch or space required by a custom mount. Compare the existing attachment and establish the missing specifications needed by that support. Check the rubber-base shape independently rather than assuming one known thread detail confirms the whole installation.

Use the retained lens to identify the sealing repair

The signal gasket description identifies a particular companion arrangement. Compare the sealing outline and housing with the lamp actually fitted. A lens changed during earlier work may require additional dimensions; no replacement lens or lamp is itemized as supplied with this gasket.

Reflector-support and lens-seal checks

What should I confirm if a reflector was mounted on a new bracket?

Measure the attachment requirements and clearance of that bracket. The reflector only states a 6mm thread, leaving pitch, post reach and face dimensions unspecified. Confirm those details where the changed support needs them before selecting the reflector.

Can the rubber base be matched to a different reflector by year alone?

Compare the front support location, base shape and reference 33743-341-670 with the parts retained. No dimensional specification for every aftermarket reflector is given. Resolve any missing measurements where the reflector or its mounting has been changed.

How do I choose the gasket when the signal housing is unmarked?

Compare the actual lens outline and sealing arrangement with the gasket’s named companion application and reference 33443-268-671. Confirm the required dimensions if the housing cannot be identified. The motorcycle application alone does not identify an unknown replacement lamp.

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Send your model and year, plus photos of your existing part and any changes to the original setup.

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