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1980 Honda CB900C Custom Clutch & Rotor Lock Nut

Confirm the exact clutch or rotor fastening position before selecting this genuine Honda 16mm lock nut for a 1980 CB900C Custom. The nut is sold individually and has several superseded references. Use the fitted assembly and applicable parts reference to establish the correct location.

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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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1980 Honda CB900C Custom · Clutch & Rotor Lock Nut Buying guide

Confirm the lock-nut location before ordering

The listed genuine Honda nut is reference 90231-KCS-651. Its broad clutch and oil-filter-rotor description should be narrowed to the actual assembly being serviced rather than applied to every engine location.

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 nutIndividual nut, reference 90231-KCS-651; confirm the exact clutch or rotor position in the applicable parts reference.View part

Use the reference with the assembly identity

The product names several superseded Honda references, but a supersession list alone does not identify where your removed nut belongs. Compare the actual part and the service or parts documentation for the fitted assembly before adding the replacement to the order.

Keep purchase scope precise

This is one hardware part rather than a clutch rebuild package or a tool. Assess the mating threads and any associated locking components using the correct service procedure. Do not assume a broad rotor description establishes an original centrifugal oil-filter arrangement on this motorcycle.

Buying questions

Is this nut genuine Honda or a replica?

The product identifies it as genuine Honda, reference 90231-KCS-651. Confirm the exact application and position against the fitted assembly before ordering.

How is the nut supplied?

Individually. The source says one is commonly required where used, but that is not a complete-motorcycle quantity; count only the verified positions being serviced.

Can I select it solely because the thread is described as 16mm?

No. Match the part reference and assembly position as well. The stated size alone does not establish the complete thread, shape or locking requirements of another nut.

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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