VintageCB750 Supplying CB Riders Since 2010

About Us Why Us? Reviews Shipping Info Returns Contact Us
Wish Lists
0 My Cart

Your cart is currently empty.

Browse all parts
Total (USD): $0.00
View cart
Menu
Search
Wish
Cart 0
My motorcycle Choose your Honda CB model

Search parts

Searching all Honda CB parts

Example: brake pads or oil filter.

1976 Honda CB400F 16mm Lock Nut

This is the nut, not a socket. It is genuine Honda, 16mm, sold each. Fitment names the 1975-77 CB400F along with several other CBs. The note says quantity required is commonly one where it is used.

Close ×
Your saved bike Choose your Honda CB model

Shop By Category

Most orders ship same or next business day Fitment guarantee Listed for your exact model and year? We’ll make it right if it doesn’t fit as described. Mechanic-backed support Ask our team for help choosing the right Honda CB part.
Currently viewing Fasteners & Hardware

Honda motorcycle parts

Choose your model and year to see parts listed for your bike.

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...
compare

1976 Honda CB400F · Fasteners & Hardware Buying guide

One nut, two jobs it may cover

Use it on a clutch basket or an oil-filter rotor that takes this 16mm nut. It is sold each. Do not order it as a tool.

Parts to consider

Honda CB 16mm Clutch / Oil Filter Rotor Lock Nut ~ Genuine Honda 90231-KCS-651 ~ Replaces 90231-KCS-651 16mm lock nutGenuine Honda, sold each. For clutch basket and oil-filter rotor applications. Replaces 90231-KCS-651. Names the 1975-77 CB400F. The text says one is common where the nut is used.View part

Nut, not the socket that turns it

The 24mm clutch tool is a different product. This 16mm nut is the hardware those jobs sometimes replace. Match 90231-KCS-651, or one of the superseded numbers printed on the product, to the nut you removed.

Commonly one is not a promise for every engine

The product says quantity required is commonly one where used. If your clutch nut and your rotor nut are both this part, that is two positions, and each purchase is still one nut. The text does not say this Supersport uses two.

Lock-nut questions

How many 16mm lock nuts does one bike use?

One is the usual count where this nut is used. Each purchase is a single nut.

Which number does it replace?

90231-KCS-651, and the product also lists 90231-200-010, 90231-028-000, and other superseded numbers. Fitment includes the 1975-77 CB400F.

Is it a clutch tool?

No. It is the 16mm nut. The clutch center-nut sockets are separate tools.

Not sure which part you need?

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

Ask a fitment question
Parts categories for 1976 Honda CB400F

Your cart

×