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1970 Honda CB175K4 Clutch & Rotor Lock Nut

The 16 mm locknut for the 1970 Honda CB175K4 is genuine Honda reference 90231-KCS-651 and is sold individually. Compare the earlier reference and required assembly position before ordering, especially if the engine or clutch has been replaced.

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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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1970 Honda CB175K4 · Clutch & Rotor Lock Nut Buying guide

Locate the nut in the assembly before ordering

A shared hardware reference can appear in more than one application. Match this nut to the specific illustrated position and required quantity rather than using the broad product title to assign its job.

Parts to consider

Honda CB 16mm Clutch / Oil Filter Rotor Lock Nut ~ Genuine Honda 90231-KCS-651 ~ Replaces 90231-KCS-651 Honda 16mm Lock NutGenuine Honda 16 mm locknut, reference 90231-KCS-651, sold individually. Confirm the assembly position when the engine or clutch has been changed.View part

Use the current reference and the diagram

Genuine Honda 90231-KCS-651 supersedes 90231-200-010, 90231-028-000, 90231-030-000, 90231-703-000, 90231-KCS-920, 90232-700-000 and 90231-200-000. Match the required illustrated assembly position when identifying older hardware, rather than relying only on the shared clutch and rotor product title.

Keep the nut separate from removal equipment

This is replacement hardware, supplied one at a time. A removal tool is a different purchase with its own working dimensions and driver interface. Assess the existing nut’s condition and the procedure’s tool requirements independently before combining them in a service order.

Common ordering questions

Is this nut genuine Honda or an OEM-type replica?

It is a genuine Honda OEM part, reference 90231-KCS-651. Use that current number alongside the earlier reference and the appropriate assembly diagram when ordering replacement hardware.

How many locknuts come with one order?

The locknut is sold individually. The catalog gives a general quantity of commonly one where used; confirm the illustrated position and quantity for the specific assembly before ordering.

Can an older reference help identify this replacement?

Yes. The supersession list includes 90231-200-010 and 90231-200-000 among seven earlier numbers. Check the complete list and intended assembly position before substituting it on an engine with an uncertain repair history.

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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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