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1978 Honda CB400TII Hawk II Engine Gaskets

Choose gasket coverage to match how far the Hawk II engine is coming apart. A valve-cover leak may call for a single shaped gasket, while a deeper strip requires a review of every joint opened and the contents of the overhaul set.

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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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1978 Honda CB400TII Hawk II · Engine Gaskets Buying guide

Match gasket coverage to the teardown

The overhaul set brings several engine gaskets into one order. The separate Athena valve-cover gasket serves a focused reseal at the top of the engine, with its own replacement reference.

Parts to consider

1978-81 Honda CB400 Athena Overhaul Gasket Set Athena overhaul gasket setAthena engine overhaul gasket set for the CB400TII, offering a broader repair option than the separate valve-cover gasket.View part 1978-86 Honda CB450 / CB400 Valve Cover Gasket ~ Replaces 12328-413-830 Athena valve-cover gasketSeparate Athena gasket for the valve cover, replacing reference 12328-413-830.View part

A cover-only repair

The separate Athena valve-cover gasket replaces reference 12328-413-830. Inspect the cover, its groove and the mating face before installation. Fresh rubber cannot compensate for damage or distortion, and the service manual remains the source for the correct assembly procedure.

Prepare each sealing joint

Keep removed gaskets identified by location and inspect the mating faces as the engine comes apart. Clean and assess the surfaces using the Honda manual’s guidance. A wider gasket order should accompany that inspection, rather than replacing attention to damaged covers, grooves or dowel locations.

Common questions

Which option suits a valve-cover leak?

The separate valve-cover gasket is the focused choice if inspection confirms the leak is at that joint. Check the cover and mating surface too, rather than expecting a new gasket to correct physical damage.

Will the overhaul set cover every seal I need?

Check its current contents against your planned teardown. The set is offered for the CB400TII, but a complete engine-specific checklist is the safest way to identify any separately required sealing pieces.

Is the separate valve-cover gasket Athena branded?

Yes. The separate cover gasket is an Athena product replacing reference 12328-413-830. It is an aftermarket service option for the listed Hawk II engine, rather than a claim of genuine Honda manufacture.

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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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