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1981 Honda CB750K Gauge Cap Nuts & Internal Seals

The small-parts choices here for the 1981 Honda CB750K are a four-piece gauge cap nut set and an internal rubber seal. The nuts are listed for stock OEM-type instrument mounting. The seal is specifically for stock-type Honda CB750 ND-brand gauges, so identify the installed instruments first.

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Honda CB900 CB750 speedo tach cap nut set 4

Honda CB900 / CB750 Speedo/Tach Cap Nut Set/4

$3.50 USD
49-0785
Mount your stock speedo and tach with this Speedo / Tach Cap Nut Set of 4. Used to mount the stock OEM-type speedometer and...
Honda CB750 CB550 CB500 speedometer tachometer internal rubber seal

Honda CB750 / CB550 / CB500 Speedometer / Tachometer Internal Rubber Seal

$11.95 USD
49-0255
Replace your gauge internal seal with this Speedometer / Tachometer Internal Rubber Seal. Replaces the ripped, dried, or missing rubber internal seal.Key Features• Speedo...
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1981 Honda CB750K · Mounts, Rubbers & Hardware Buying guide

Check the mounting type and gauge brand

These two products replace different pieces: external mounting nuts and an internal sealing rubber. Neither is a complete gauge, and the seal’s ND-brand restriction matters if the motorcycle has aftermarket or replacement instruments.

Parts to consider

Honda CB900 / CB750 Speedo/Tach Cap Nut Set/4 Four-piece gauge cap nut setCap nuts for stock OEM-type speedometer and tachometer mounting. The package contains four nuts, referencing 94021-06020.View part Honda CB750 / CB550 / CB500 Speedometer / Tachometer Internal Rubber Seal ND-brand gauge internal rubber sealInternal seal listed for stock-type Honda CB750 ND-brand gauges. Check the brand and seal location before ordering.View part

Use the gauge that is installed as the buying reference

Previous repairs may have changed an instrument or its mounting arrangement. Check the gauge brand and the mounting hardware on the motorcycle before choosing these parts. The cap nuts are for the stock OEM-type arrangement, while the internal seal listing states a specific ND-brand gauge restriction.

Keep a missing nut and an internal seal repair separate

The nut set supplies four mounting cap nuts. The rubber seal listing addresses a ripped, dried or missing internal seal inside a suitable gauge. Identify the location of the damaged piece first; this category does not establish an external cushion or a complete instrument rebuild kit as part of either purchase.

Common questions

Does the internal rubber seal fit any gauge on a CB750K?

The listing specifies stock-type Honda CB750 ND-brand gauges. Confirm that brand and type on the installed instrument before ordering. A motorcycle-model fitment entry does not remove the restriction or establish compatibility with an aftermarket gauge.

What does the cap nut set contain?

It is listed as a set of four cap nuts for mounting stock OEM-type speedometer and tachometer assemblies, referencing 94021-06020. It does not describe a gauge, rubber seal or other instrument hardware as part of that set.

Is the internal seal a replacement for the gauge’s mounting cushion?

The listing identifies an internal rubber seal, while the cap nut set addresses mounting hardware. Match the damaged piece by its position and photograph. Do not choose an internal seal as an external cushion simply because both are rubber instrument parts.

Not sure which part you need?

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

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