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1978 Honda CB550K Steering Stem Nuts and Washer

The steering choices here center on the external stem nut and washer, with chrome and black nut options. Compare the fitted nut and retained washer before selecting the finish. Keep these fittings separate from fork-cap parts and from any bearing-service purchase you are planning.

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Currently viewing Steering Hardware & Dampers

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Honda CB1000 CB900 CB750 CB550 chrome steering stem nut 90304-415-000

Honda CB Chrome Steering Stem Nut ~ Replaces 90304-415-000

$9.95 USD
49-0786
Replace your steering stem nut with this Chrome Steering Stem Nut, hex nut size 30mm, replacing OEM #90304-415-000.Sold each. We also offer the matching...
Honda CB750 CB550 CB500 CB450 CB400 fork cap o-ring (set 2) 94608-50000

Honda CB Fork Cap O-Ring (Set/2)

$2.95 USD
49-0790
Replace your fork cap O-rings with this Fork Cap O-Ring Set of 2, replacing OEM #94608-50000 (qty 2).Key Features• Fork cap O-rings• Set of...
Honda CB1000 CB900 CB750 CB550 steering stem washer 90503-283-000

Honda CB Steering Stem Washer ~ Replaces 90503-283-000

$3.50 USD
49-0787
Replace your steering stem washer with this Chrome Steering Stem Washer, replacing OEM #90503-283-000.Sold each, order the quantity you require.Key Features• Chrome steering stem...
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Honda CB750 CB550 black steering stem nut joker machine 90304-415-000

Honda CB Black Steering Stem Nut ~ Joker Machine ~ Replaces 90304-415-000

$47.95 USD
12-0073
Dress up your steering stem with this Joker Machine Black Steering Stem Nut, 30mm hex, replacing OEM #90304-415-000. High-quality CNC-machined and made in the...
Honda CB750 CB550 CB500 CB450 type black fork caps (set 2) joker machine 90123-300-000

Honda CB750 / CB550 / CB500 / CB450 Type Black Fork Caps (Set/2) ~ Joker Machine ~ Replaces 90123-300-000

$99.95 USD
73-1064
Top off your forks with these Joker Machine Brand Custom Black Fork Caps, set of 2, with O-rings. Replaces OEM #90123-300-000.High-quality CNC-machined from billet...
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1978 Honda CB550K · Steering Hardware & Dampers Buying guide

Check the stem fitting first, then choose its finish

The chrome and black nuts list the same reference pattern and 30 mm hex. Match the fitted assembly, then assess the separate washer; fork-cap O-rings and cap pairs address other fittings at the front end.

Parts to consider

Honda CB Chrome Steering Stem Nut ~ Replaces 90304-415-000 Chrome steering stem nutIndividual chrome nut referencing 90304-415-000, with a listed 30 mm hex. The matching stem washer is offered separately.View part Honda CB Steering Stem Washer ~ Replaces 90503-283-000 Individual chrome stem washerWasher referencing 90503-283-000, sold each. Compare the retained washer and choose its needed quantity independently from the nut.View part Honda CB Black Steering Stem Nut ~ Joker Machine ~ Replaces 90304-415-000 Joker Machine black stem nutCNC-machined black nut referencing 90304-415-000, with a listed 30 mm hex. Choose the finish after comparing the installed fitting.View part

Make the finish decision after the reference check

Chrome and black are different appearance choices for the listed stem nut pattern. Both descriptions specify a 30 mm hex and reference 90304-415-000. Compare the installed fitting first, then choose the finish and assess whether the separately sold washer also needs replacement.

Keep cap seals apart from stem hardware

The fork-cap O-ring pair and custom cap pair concern the fork tops rather than the steering stem nut. Identify the exact front-end fitting needing repair before building the order. Replacing an external nut or washer should not be treated as a complete steering-bearing service package.

Common questions

Does the chrome nut come with its washer?

The chrome nut is sold individually and its description offers a matching washer separately. Inspect the retained washer and select it as another purchase if needed, rather than assuming a complete nut-and-washer set.

Is the black nut a different wrench size?

Both stem nut descriptions state a 30 mm hex. Check the fitting currently on the motorcycle before choosing a tool, then consider black or chrome as the finish choice within the listed reference pattern.

Are the fork-cap O-rings intended for the stem nut?

They are described as a two-piece fork-cap O-ring set referencing 94608-50000. The steering stem washer has a different reference and purpose, so identify the actual fitting instead of substituting nearby front-end parts.

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