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1983 Honda CB1000C Fasteners & Hardware

Only one general fastener is tagged to the 1983 Honda CB1000C: a factory Honda 16mm locking nut of the kind that secures the clutch basket or oil filter rotor. Fitting a fresh one costs little when either assembly is already apart.

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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 CB1000C · Fasteners Buying guide

Match the clutch locking hardware

The CB1000C clutch uses a lock washer whose tab is bent against the tightened nut. Check the nut and its separate locking hardware against the Honda procedure; do not treat this as a generic deformed-thread lock nut.

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 nutHolds the clutch basket or oil filter rotor on compatible Honda engines.View part

When to replace it

The listing offers this nut as a replacement for worn or damaged hardware. Assess the complete locking arrangement during clutch service and follow the CB1000C manual for assembly. The word “lock” does not establish that the nut loses its grip each time it is removed.

Pair it with washers

Honda’s CB1000C procedure identifies a plain washer, a lock washer and the lock nut as separate parts, then secures the assembly using a lock-washer tab after tightening. A new nut does not replace those washers or eliminate the required locking step. Follow the manual’s orientation and tightening instructions.

Fastener questions

Is the nut a factory Honda part?

The listing describes 90231-KCS-651 as a genuine Honda nut and names the 1983 CB1000C. It also asks buyers to confirm the part number and installation location, particularly when the engine or clutch has been changed.

Why does it also show up under fork parts?

It carries a fork category tag as well, but it belongs on the clutch basket or oil filter rotor rather than in the fork, so this fastener guide covers it.

Are other fasteners listed?

No other general fasteners are tagged to the CB1000C in this category. Model-specific screws, such as the tail light and carb screws, are listed in their own sections.

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