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1978 Honda CB400A Fork Seals & Dust Boots

The fork service choices here are 33 × 46 × 11 mm oil seals and a separate set of 33 mm dust boots. Both list the 1978 CB400A. Inspect the fitted fork and the condition of both pieces before assembling your service order.

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Currently viewing Fork Tubes, Springs, Seals & Boots

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Honda CB450 CB400 CB360 fork seals

Honda CB450 / CB400 / CB360 Fork Seals

$21.95 USD
27-1019
Replace your CB400 or CB360 fork seals with this Fork Seal Set, 33 x 46 x 11mm. Made in Japan by OEM supplier.Key Features•...
Honda CB450 CB400 CB360 CL360K0 fork dust boot set 91254-413-881

Honda CB Fork Dust Boot Set ~ Replaces 91254-413-881

$15.95 USD
73-0189
Refresh your fork seal dust boots with this Fork Seal Dust Boots Set of 2. 33mm size. Replaces OEM #91254-413-881.Key Features• Fork seal dust...
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1978 Honda CB400A · Fork seals & dust boots Buying guide

Choose oil seals and outer dust protection separately

The seal retains oil inside the fork, while the dust boot protects the exposed seal area. Compare the installed fork dimensions if the motorcycle has received a replacement front end.

Parts to consider

Honda CB450 / CB400 / CB360 Fork Seals Fork seal set33 × 46 × 11 mm fork seals made in Japan, with the 1978 CB400A explicitly included in the application.View part Honda CB Fork Dust Boot Set ~ Replaces 91254-413-881 Fork dust bootsSet of two 33 mm dust boots, replacing Honda reference 91254-413-881.View part

Use the complete seal measurement

A 33 mm figure alone is not the complete oil-seal specification. The offered seals measure 33 × 46 × 11 mm and are made in Japan. If the fork has been changed, compare the old seal markings and fork application before relying on the CB400A listing.

Inspect the boots during the same service

The dust boot set contains two 33 mm boots and replaces 91254-413-881. Inspect their seating surfaces and the fork tubes while assessing the repair. Use the CB400A service manual for disassembly, oil specification and assembly requirements; the replacement-part dimensions do not supply those procedures.

Fork seals & dust boots buying questions

Are the oil seals and dust boots the same part?

No. The oil seals work inside the fork assembly and the dust boots cover the outer seal area. They are separate listings, so inspect both and include the appropriate items in your order.

What dimensions should I compare before ordering seals?

The offered oil seals are 33 × 46 × 11 mm. Compare all three measurements and the installed fork’s application. A shared nominal tube size alone does not verify a replacement fork uses the same seal.

How many dust boots are supplied?

The dust boot listing explicitly supplies a set of two 33 mm boots. It references 91254-413-881 and includes the 1978 CB400A. The oil seal set is a separate purchase, with its own product details.

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