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1977 Honda CB750F Fasteners & Hardware

Only a single fastener carries the 1977 Honda CB750F tag. Honda supplies it as 90231-KCS-651, a 16mm self-locking nut used where the clutch hub and the centrifugal oil filter rotor are held on their shafts. It supersedes older numbers.

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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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1977 Honda CB750F · Fasteners & hardware Buying guide

Small nut, big job

Match this Honda 16 mm lock nut by reference and installation location before ordering. The broad catalogue description covers clutch and oil-filter-rotor applications across several models; it does not establish both locations on this particular F.

Fastener to consider

Honda CB 16mm Clutch / Oil Filter Rotor Lock Nut ~ Genuine Honda 90231-KCS-651 ~ Replaces 90231-KCS-651 Genuine Honda 16 mm lock nutGenuine Honda 16 mm lock nut, reference 90231-KCS-651, sold individually.View part

Reference matching

The supplier lists 90231-KCS-651 with superseded references 90231-200-010, 90231-028-000, 90231-030-000, 90231-703-000, 90231-KCS-920, 90232-700-000 and 90231-200-000. Use the applicable parts information to match the location required.

Quantity and application

The nut is sold individually and is described as commonly one where used. The product lists the 1975–82 CB750F; confirm the reference and location for the actual engine rather than treating the broad application as a complete fastener map.

Lock nut questions

What does this nut hold?

The supplier describes compatible Honda clutch-basket and oil-filter-rotor applications across its model list. Confirm the specific location in the fitted engine’s parts information before ordering this nut.

Who manufactures it?

The supplier identifies it as genuine Honda, part 90231-KCS-651, with several earlier references listed as superseded.

What should I check after an engine or clutch swap?

Match the nut to the engine and clutch actually fitted, using the replacement reference and location in the applicable parts information. The motorcycle’s frame year alone may not identify the required fastener.

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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