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1978 Honda CB750F Genuine Honda Lock Nut Hardware

The hardware choice here for the 1978 CB750F is a genuine Honda 16mm lock nut, sold each. Its description covers compatible clutch and oil-filter rotor applications across several models. Locate the nut in the applicable parts diagram before assigning it to a particular assembly.

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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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1978 Honda CB750F · Fasteners & Hardware Buying guide

Choose the installed nut by its reference and location

The listing identifies Honda reference 90231-KCS-651 and superseded references. Its broad application does not name every model’s installation position, so compare the actual assembly and diagram rather than deriving a location from the product title.

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 nutHonda reference 90231-KCS-651, sold each. Confirm the nut’s location and reference in the applicable parts diagram before selecting this installed hardware.View part

Use the assembly reference to settle the application

The product includes CB750F 1975–82 in its fitment and specifically asks buyers to confirm the part number and location in the relevant diagram or manual. Follow that comparison for the fitted engine. The general clutch/oil-filter rotor title does not establish both locations on this motorcycle.

Keep nut dimensions separate from service-tool dimensions

The hardware is described as a 16mm lock nut. The description does not specify a thread pitch, direction or tool-interface measurement. Compare the required part reference first, then select service equipment from its own application and working dimensions rather than assuming a socket match from the nut’s name.

Common questions

Is this a genuine Honda part or a service tool?

The description identifies genuine Honda hardware with reference 90231-KCS-651. It is the installed lock nut, not the tool used to service a locking nut. Check the required part and workshop tool as separate purchases.

Does one quantity provide a complete fastener set?

The nut is explicitly sold each. A note that one is commonly required where used does not make it a multi-piece package or identify every location on this model. Confirm the actual assembly and order the number of individual nuts needed.

Can I assume an oil-filter rotor installation on my CB750F?

The title covers clutch and oil-filter rotor applications across a broad Honda range. Confirm the nut’s location in the applicable CB750F diagram or service information. Do not infer an assembly on this motorcycle solely from that shared product wording.

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