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1972 Honda CB350K4 Fork Tubes & Hardware

The 1972 K4 fork differs from earlier CB350 assemblies. The replacement tube pair here measures 555mm long with a 33mm outside diameter. Compare the complete fitted front end before buying, especially where earlier forks or other Honda components have been installed.

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Currently viewing Fork Tubes, Springs, Seals & Boots

Honda motorcycle parts

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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 CB1100 CB1000 CB900 CB750 16mm clutch oil filter rotor lock nut 90231-KCS-651

Honda CB 16mm Clutch / Oil Filter Rotor Lock Nut ~ Genuine Honda 90231-KCS-651 ~ Replaces 90231-KCS-651

$10.95 USD
99-5383
This genuine Honda 16mm lock nut is used on compatible Honda CB clutch basket and oil filter rotor assemblies. It is a small hardware...
Honda CB350 CL350 fork tube set 51410-317-700

1972-74 Honda CB350 / CL350 Fork Tube Set ~ Replaces 51410-317-700

$179.95 USD
73-0943
Replace your fork tubes with this Fork Tube Set of 2, length 555mm (21.85") with 33mm OD. Replaces OEM #51410-317-700.Note: before ordering please confirm...
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1972 Honda CB350K4 · Fork Tubes & Hardware Buying guide

Identify the K4 fork before choosing tubes

A model tag cannot resolve a changed front end. Measure the existing tubes and identify the fork assembly, then compare the replacement dimensions and application before planning the overhaul.

Parts to consider

1972-74 Honda CB350 / CL350 Fork Tube Set ~ Replaces 51410-317-700 Fork tube pairTwo replacement tubes, 555mm long with 33mm outside diameter; listed for the 1972 CB350K.View part

A two-tube replacement order

The tube product supplies two pieces with the stated 555mm length and 33mm outside diameter. Those are the replacement’s dimensions. Check your existing assembly and required length before ordering; the tube pair does not by itself establish which other overhaul parts your fork needs.

Use the K4 seal specification

Honda’s K4 fork reference is 91255-312-003 for a 33 × 46 × 10.5mm seal, with two required. Match seals to the actual fork fitted. The K4 revision makes earlier CB350 fork assumptions unreliable even when the motorcycle’s model name looks similar.

Buying questions

Is the fork tube product one tube or a pair?

It is a set of two replacement tubes. Each is specified as 555mm long with a 33mm outside diameter; confirm both dimensions against the fork assembly you intend to rebuild.

Can I choose seals using only the tube diameter?

No. Seal outside diameter and thickness also matter. Honda specifies 33 × 46 × 10.5mm for the K4 reference, and a changed fork may require a different seal.

What if my existing tubes are a different length?

Identify the fitted fork before ordering. A previous owner may have changed the front end or tubes. Use the assembly references and measured dimensions to establish the required replacement rather than assuming the year tag resolves it.

Not sure which part you need?

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

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