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1981 Honda CB400TB Engine Gaskets

Choose the gasket order after deciding which engine joints will be disturbed. The 1981 CB400TB selection includes an Athena overhaul set and a separate valve-cover gasket, allowing a small cover repair to stay focused or a larger job to be planned together.

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Honda CB400 Athena overhaul gasket set

1978-81 Honda CB400 Athena Overhaul Gasket Set

$119.95 USD
18-0103
Rebuild your CB400 engine with this Athena Overhaul Engine Gasket Set. Athena of Italy is an original-equipment supplier to Yamaha, Honda, Kawasaki, Suzuki, and...
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Honda CB450 CB400 valve cover gasket 12328-413-830

1978-86 Honda CB450 / CB400 Valve Cover Gasket ~ Replaces 12328-413-830

$31.95 USD
12-1014
Replace your CB400 or CB450 valve cover gasket with this Athena Brand Valve Cover Gasket, replacing OEM #12328-413-830. Fits the full CB400A/TI/TII/T range plus...
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1981 Honda CB400TB · Engine Gaskets Buying guide

Choose between a cover repair and wider disassembly

The separate cover gasket serves a specific joint. An overhaul set provides a broader selection, but its suitability still depends on the engine work and the individual pieces needed for that repair.

Parts to consider

1978-81 Honda CB400 Athena Overhaul Gasket Set Athena engine gasket setOverhaul gasket selection for the CB400T engine. Match the individual gaskets to the joints being opened.View part 1978-86 Honda CB450 / CB400 Valve Cover Gasket ~ Replaces 12328-413-830 Athena valve-cover gasketSeparate cover gasket replacing reference 12328-413-830 for a repair limited to the valve-cover joint.View part

Order for the joints being opened

A valve-cover leak does not automatically call for a complete overhaul set. Inspect the cover, fasteners and mating surface, then use the separate cover gasket when the repair is confined to that location. Broader dismantling should have its own gasket checklist.

Check set coverage before teardown

Lay out the required repair parts by engine assembly and compare them with the set description and product photographs. The name “overhaul set” does not establish an inventory of every oil seal, sealing washer or fastener. Resolve any missing repair item before the engine is apart.

Buying questions

Can I buy the valve-cover gasket separately?

Yes. The Athena cover gasket is available as its own item and references 12328-413-830. Match the fitted cover and gasket shape, particularly on a motorcycle with a replacement engine or cover.

Should I order both featured products?

Only if the planned repair needs both purchases after you have checked the set contents. The separate cover gasket and the overhaul assortment are different ordering choices; avoid buying duplicate coverage unnecessarily.

Will a new gasket cure a distorted cover?

A gasket cannot correct a damaged or distorted mating part. Inspect the cover and sealing surfaces before choosing parts, and use the Honda service information for the repair and assembly procedure.

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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