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.

1970 Honda CB350K2 Oil Filter Rotor Lock Nut

The genuine Honda 16 mm lock nut is a small but specific part of the 1970 CB350K2 oil-filter rotor service. Match its location and reference in the parts diagram before ordering, rather than selecting it solely from a broad clutch-hardware description.

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

1970 Honda CB350K2 · Oil Filter Rotor Lock Nut Buying guide

Match the lock nut to the K2 oil-filter rotor

The K2 oil-filter parts diagram identifies a 16 mm lock nut at the rotor. Use that location and the current replacement reference together when preparing the hardware needed for the service.

Parts 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 90231-KCS-651 lock nut, sold individually. Match the service location and original reference.View part

Keep the application tied to its location

The original K2 oil-filter catalog identifies one 90231-200-010 lock nut in the rotor assembly. The current replacement is genuine Honda 90231-KCS-651. Use those references with the diagram when identifying the part, especially if the engine or related components have been changed.

Separate nut size from the tool choice

The product is replacement hardware, sold individually. Its 16 mm designation does not state a conventional socket size or supply a removal tool. Prepare the appropriate tool and follow the Honda service instructions for the rotor hardware before beginning the repair.

Common buying questions

How many lock nuts does this product supply?

It is sold individually. The original K2 oil-filter rotor diagram specifies one nut at this location; confirm the assembly being serviced before adding quantities for other jobs.

Why is the new Honda reference different from the old catalog?

The original K2 diagram lists 90231-200-010, while the current genuine replacement is 90231-KCS-651. Match the documented replacement and rotor location rather than assuming different numbers alone mean incompatibility.

Does this nut fit every clutch location named in its title?

Use the exact model’s parts diagram for each location. The verified K2 application here is the oil-filter rotor lock nut; a broad product title should not substitute for checking another assembly.

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 1970 Honda CB350K2

Your cart

×