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1974 Honda CB450K Engine Gasket Coverage & Separate Seal References

Start the sealing purchase for your 1974 CB450K with a list of the joints and seals needing work. Overhaul sets, the seven oil seals and the cylinder-stud gasket have different descriptions. Match required shapes and references, then confirm package coverage without assuming a combined kit.

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Currently viewing Gaskets & Oil Seals & Engine Hardware

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Honda CB500 CB450 CL450K1 CL450K2 CL450K3 overhaul gasket set

Honda CB Overhaul Gasket Set

$64.95 USD
18-0098
Rebuild your CB500T or CB450/CL450 engine with this Engine Overhaul Gasket Set.Note: fits 5-speed CB450K models only.Key Features• Engine overhaul gasket set• For 5-speed...
New
Honda CB450 CL450 CB500T engine oil seal kit with 7 seals 91202-283-013

1968-76 Honda CB450 / CL450 / CB500T Engine Oil Seal Kit

$21.95 USD
01-9926
Refresh critical engine sealing points with this Engine Oil Seal Kit (7 Pieces), designed to replace common oil seals used in the engine assemblies...
Honda CB500 CB450 CB400 CB360 CB350 cylinder head gasket 12909-428-003

Honda CB Cylinder Head Gasket ~ Replaces 12909-428-003

$2.95 USD
73-1186
Restore top-end sealing performance with this high-quality Cylinder Head Gasket. Designed to match OEM specifications, this gasket ensures a perfect fit and proper sealing...
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Honda CB450 CL450K2 CL450K3 CL450K4 CL450K5 Athena overhaul gasket set

Honda CB Athena Overhaul Gasket Set

$99.95 USD
18-0297
Rebuild your CB450K or CL450K engine with this Athena Overhaul Engine Gasket Set. Athena of Italy is an original-equipment supplier to Yamaha, Honda, Kawasaki,...
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1974 Honda CB450K · Gaskets & Oil Seals & Engine Hardware Buying guide

Separate gasket coverage from the oil-seal inventory

One overhaul set expressly requires a five-speed CB450K engine. The seven-seal kit supplies reference-and-size entries without a location map. The small 12909-283-000 component is a cylinder-stud gasket/seal rather than a combustion head gasket.

Parts to consider

Honda CB Overhaul Gasket Set Overhaul gaskets for five-speed enginesGasket set with an explicit five-speed CB450K restriction. Confirm the engine and supplied gasket shapes; a complete package inventory is not given.View part 1968-76 Honda CB450 / CL450 / CB500T Engine Oil Seal Kit Seven oil seals with reference entriesKit expressly supplies seven seals. Compare the listed references and full dimensions with the components needed; the description does not map each seal to an engine location.View part Honda CB Cylinder Head Gasket ~ Replaces 12909-428-003 Small cylinder-stud gasket/sealSmall seal associated with Honda 12909-283-000. Intended cylinder-stud function must be distinguished from the main head gasket; confirm purchase quantity separately.View part

Related parts: Athena alternative with listed CB450K application

Ask for contents where the two overhaul sets differ

The restricted set specifies five-speed CB450K use, and the Athena description lists CB450K 1968–74 application. Neither provides a full gasket inventory. Compare the actual shapes required and obtain package details before choosing between them; the broader application or brand name does not establish identical contents or extra seals supplied.

Preserve the complete seal entry when asking for clarification

The seven-seal list gives 91205-200-000 as 22 × 26 × 29 × 8. Keep all four numbers with the reference when comparing the removed component or requesting dimensional clarification. Do not reduce that entry to an assumed three-dimension format or assign an engine position from the size alone.

Buying questions

What should I confirm if the repair specifically needs a main head gasket?

Identify the main gasket required and confirm it in the chosen package’s supplied inventory. The small 12909-283-000 component serves a cylinder stud. Its presence as a separate product does not confirm a combustion head gasket or a complete head-sealing package.

How can I compare an unmarked oil seal with the seven-piece kit?

Use the required location’s parts information and the removed component to establish the correct reference and complete dimensions. The kit supplies a list, not an installation map. Clarify unfamiliar size notation instead of choosing a position from a similar diameter.

What quantity information is still needed for the small stud seal?

Confirm how many pieces one purchase supplies, then identify the quantity required for the work from appropriate information for the fitted engine. The listing does not establish that count, and an overhaul-set name does not confirm this seal is included.

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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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