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1979 Honda CB750F Clutch Lock-Nut Hardware

Identify the clutch lock nut you need on your 1979 Honda CB750F before buying replacement hardware. This genuine Honda 16mm nut is supplied individually and carries a current OEM number with several earlier references. Check the location and fitted assembly first.

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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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1979 Honda CB750F · Clutch Lock Nut Buying guide

Confirm the clutch hardware reference before replacing it

Small locking hardware needs a precise application check. Match the current or superseded reference to the actual clutch assembly, especially after engine changes, rather than selecting a nut by its approximate appearance.

Parts to consider

Honda CB 16mm Clutch / Oil Filter Rotor Lock Nut ~ Genuine Honda 90231-KCS-651 ~ Replaces 90231-KCS-651 Genuine Honda 16mm clutch lock nutIndividual genuine Honda nut referencing 90231-KCS-651, with earlier references including 90231-200-010. Confirm the application in the fitted clutch assembly.View part

Match the reference as well as the model

The replacement nut has several earlier references listed on its product page. Compare the relevant number in the clutch diagram with the current replacement. If the engine or clutch has been changed, use that fitted assembly’s details rather than relying on the frame’s model year.

Plan the hardware and tool together

Inspect the locking nut and nearby clutch hardware before ordering. This item is the nut alone, supplied individually; other pieces should be identified separately. Follow the service manual for the required holding, removal and tightening method, using a tool that engages the special nut correctly.

Common ordering questions

Is this genuine Honda hardware?

Yes. The product is identified as genuine Honda, under current reference 90231-KCS-651. Compare that number and its stated earlier references with the fitted clutch assembly before ordering.

Does one order supply a pack of nuts?

No. The lock nut is sold individually. Order the quantity required for the confirmed application; the broad product description covers different uses across several Honda models.

Can I use the frame model alone after an engine swap?

Check the engine and clutch assembly now fitted. Match its parts-diagram reference and locking-nut profile to the replacement rather than assuming the frame’s original model determines the correct 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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