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1983 Honda CB1100F 16mm Lock Nut

When the clutch basket or oil filter rotor comes apart on a 1983 Honda CB1100F, this factory 16mm locking nut, number 90231-KCS-651, is the listed replacement. Its page shows it superseding seven earlier Honda 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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1983 Honda CB1100F · Fasteners Buying guide

A small part for a key job

Locking nuts on the clutch and oil filter rotor hold important parts in place. A damaged or reused nut can be swapped for this factory part during service.

Fastener to consider

Honda CB 16mm Clutch / Oil Filter Rotor Lock Nut ~ Genuine Honda 90231-KCS-651 ~ Replaces 90231-KCS-651 Factory Honda 16mm locking nutHonda 90231-KCS-651 for clutch basket and oil filter rotor assemblies.View part

Superseded numbers

According to the page, 90231-KCS-651 replaces 90231-200-010, 90231-028-000, 90231-030-000, 90231-703-000, 90231-KCS-920, 90232-700-000 and 90231-200-000. Look up the number for your engine in your parts book and compare it with this list before ordering a replacement nut.

Fitting the nut

Use a clutch center nut tool so the nut is not damaged during removal or refitting, then tighten it to the torque figure in your service manual. The same nut also appears in the fork tube category, which looks like a tagging mistake.

Lock nut questions

Is this a factory Honda part?

Yes. The page describes it as a genuine Honda OEM part, number 90231-KCS-651, used on compatible clutch basket and oil filter rotor assemblies on CB models.

Which old numbers does it replace?

The page shows it superseding 90231-200-010, 90231-028-000, 90231-030-000, 90231-703-000, 90231-KCS-920, 90232-700-000 and 90231-200-000, seven numbers in all. Compare them with the number in your parts book.

Does the page name the CB1100F?

Yes. Its fitment block includes the 1983 CB1100F. Check your parts book to confirm where the nut is used on your engine before placing an order.

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Send your model and year, plus photos of your existing part and any changes to the original setup.

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