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1969 Honda CB750K Clutch Lock Nut Hardware

The hardware item in this 1969 Honda CB750K category is a genuine Honda 16mm lock nut listed for compatible clutch basket and oil filter rotor applications. Confirm its reference and exact location in the appropriate parts diagram before ordering, especially on a changed engine.

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1969 Honda CB750K

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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...
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1969 Honda CB750K · Fasteners & Hardware Buying guide

Confirm the lock nut by its reference and assembly location

The nut has a broad application list and several superseded references. Match the actual part number and location to the fitted assembly rather than assuming the same small hardware item is used everywhere on the motorcycle.

Parts to consider

Honda CB 16mm Clutch / Oil Filter Rotor Lock Nut ~ Genuine Honda 90231-KCS-651 ~ Replaces 90231-KCS-651 Genuine Honda 16mm lock nutGenuine Honda 90231-KCS-651, sold each; check the listed reference and assembly location before ordering.View part

Use the diagram to identify the small part

The replacement reference is 90231-KCS-651, with earlier references including 90231-200-010 and 90231-028-000. Match the required clutch nut in the correct parts information. The product’s broad oil-filter-rotor wording does not identify an additional location on this CB750.

Check a changed engine independently

The product buyer notes specifically call for checking the parts diagram or service manual where the engine or clutch assembly has changed. Follow that advice when selecting the nut. It is sold each, so base the order quantity on the identified assembly rather than assuming multiple locations use the same part.

Fasteners & Hardware questions

Is this genuine Honda hardware?

Yes. The offered nut is identified as genuine Honda, reference 90231-KCS-651. Match that reference or a documented superseded reference to the required assembly before ordering.

Does the listing supply a set of nuts?

No. The stated sales unit is each. The listing notes that commonly one is required where used, but the exact order quantity should follow the identified location in the appropriate diagram for your fitted assembly.

Does 16mm alone confirm the correct nut?

No. The description includes a specific Honda reference and compatible clutch or rotor applications. Match the reference and exact diagram location as well as the size; a dimensional label alone is insufficient to identify the correct engine hardware.

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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