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1973 Honda CB450K Gasket Shapes, Oil-Seal Entries & Stud Seals

Make the sealing order for your 1973 CB450K from the joints and components being serviced. Compare overhaul gasket coverage, the seven oil-seal entries and the small stud seal independently. Their names and shared application do not define one combined package or identical repair requirements.

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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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1973 Honda CB450K · Gaskets & Oil Seals & Engine Hardware Buying guide

Match the sealing reference before interpreting the package count

The seven-seal kit lists references and dimensions without an engine-position map. Overhaul gasket inventories are not fully itemized. The small seal associated with 12909-283-000 serves a cylinder stud, not the main combustion gasket.

Parts to consider

Honda CB Athena Overhaul Gasket Set Athena overhaul gasket setEngine gasket set with listed CB450K application. Confirm which gasket shapes it supplies; brand and application do not itemize the complete package contents.View part 1968-76 Honda CB450 / CL450 / CB500T Engine Oil Seal Kit Seven-piece engine oil-seal kitSeven seals listed by reference and dimension entry. Compare every needed reference and retain unusual multi-number entries without guessing their meaning.View part Honda CB Cylinder Head Gasket ~ Replaces 12909-428-003 Small cylinder-stud gasket/sealSmall seal listing 12909-283-000 among its references. Match the stud-seal component required; it is separate from the larger main combustion head gasket.View part

Related parts: Overhaul gasket set for five-speed engines

Confirm required pieces instead of assuming set equivalence

The two overhaul descriptions do not establish identical supplied inventories. Compare the gasket shapes needed at the serviced joints and ask about uncertain inclusions. The restricted set requires a five-speed CB450K engine. Separate oil-seal or stud-seal purchases should be assessed from confirmed contents rather than automatically added or assumed included.

Preserve the complete seal size until its meaning is confirmed

One oil-seal entry uses four numbers alongside its Honda reference. Keep that entry intact when comparing the removed part and confirm any unclear measurement before ordering. Reducing it to a conventional three-number size or assigning an engine location from the numbers would introduce information the description does not supply.

Buying questions

How do I distinguish the small 12909 seal from the main head gasket?

Use the replacement reference and component function together. Honda identifies 12909-283-000 as a cylinder-stud gasket; the main combustion head gasket is separate. Compare the required physical part before allowing the broad head-gasket product wording to define the purchase.

What if a required seal’s size entry is unclear?

Retain the complete listed entry with its Honda reference and compare the component removed. Request clarification of the uncertain measurement before selecting by size. The kit’s seven-piece count does not resolve an ambiguous dimension or identify each engine position.

Should I order a separate stud seal alongside an overhaul set?

Establish whether the work requires that small seal, then confirm whether the selected set contains it. Neither overhaul description provides a complete piece inventory. Decide the separate purchase from confirmed coverage and required quantity, rather than the general overhaul label.

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