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1970 Honda CB450K Gasket Sets, Oil Seals & Stud Sealing

Use the sealing job to narrow the choices for a 1970 Honda CB450K. Engine gasket sets, a seven-piece oil-seal kit and a small cylinder-stud seal cover different components. Compare references and gasket shapes before assuming that one package includes another.

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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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1970 Honda CB450K · Gaskets & Oil Seals & Engine Hardware Buying guide

Identify the sealing component before comparing sets

One overhaul set expressly requires a five-speed CB450K engine. Neither set description provides a complete piece list. The 12909-series item is the small cylinder-stud seal, distinct from the main gasket around the combustion chambers.

Parts to consider

Honda CB Overhaul Gasket Set Five-speed-restricted overhaul gasket setEngine overhaul set explicitly limited to five-speed CB450K engines. Confirm the engine and required gasket coverage before ordering.View part 1968-76 Honda CB450 / CL450 / CB500T Engine Oil Seal Kit Seven engine oil sealsKit containing seven seals with Honda references and dimension entries. Check each required seal without assigning unspecified locations from size alone.View part Honda CB Cylinder Head Gasket ~ Replaces 12909-428-003 Small cylinder-stud gasket/sealSmall seal listed against Honda 12909-283-000 and related references. Its component function is cylinder-stud sealing, rather than a main combustion head gasket.View part

Related parts: Athena overhaul gasket-set alternative

Compare coverage before choosing a brand

Start with the fitted engine and the gasket shapes required by the work. Keep the explicit five-speed condition with the applicable set. The Athena and other overhaul descriptions do not provide matching piece inventories, so establish coverage before treating the two purchases as equivalent.

Keep ambiguous measurements intact

The seven-seal description includes a four-number dimension entry as well as simpler sizes. Match its reference and confirm how that entry relates to the required part; do not discard a number to force a standard size. The description does not provide a seal-position map.

Buying questions

How do I decide whether the oil-seal kit covers my job?

Compare the seals identified in the work with the seven listed references and their complete dimensions. Confirm unclear entries before ordering. The count of seven describes supplied seals, not a promise that every sealing component in the engine is included.

What should I compare when the removed seal looks different from the title?

Use the component reference and actual shape. The small 12909-series product is a cylinder-stud seal despite the broad head-gasket title. It should not be substituted for the separate main combustion gasket or assumed to cover that gasket’s job.

Are separate oil seals automatically included in an overhaul gasket set?

The gasket-set descriptions do not confirm that coverage. Check the required oil-seal references separately and verify any claimed inclusion before buying. Keep the small stud seal and its quantity separate as well unless the selected set’s contents are confirmed.

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