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1978 Honda CB550K Engine Covers, Caps & Gaskets

The 1978 Honda CB550K cover selection includes a chrome points cover, finned tappet cap and genuine Honda breather cover. These serve different positions and have different gasket statements. Compare the required cover with the fitted engine, then read its contents before adding seals or hardware.

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Honda CB750 CB550 CB500 CB400 CB350 point plate gasket 30372-300-300

Honda CB Point Plate Gasket ~ Replaces 30372-300-300

$7.50 USD
18-7010
Replace your Contact Point Plate Cover Gasket with this Point Plate Gasket, replacing OEM #30372-300-300. Broad fitment across the SOHC CB750, CB500K/CB550 family, and...
Honda CB750 CB550 CB500 CB400 CB350 chrome points cover 30370-300-020

Honda CB Chrome Points Cover ~ Replaces 30370-300-020

$39.95 USD
13-0000
Refresh your engine's points cover with this Chrome Engine Points Cover, replacing OEM #30370-300-020 / #30370-323-000. Points covers are often dented, rusted, or worn,...
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Honda CB valve tappet cover rocker cap 12361-300-000

Honda CB Valve Tappet Cover / Rocker Cap ~ Replaces 12361-300-000

$6.95 USD
01-9980
Dress up your Honda's top end with this Valve Tappet Cover (Rocker Cap), an aftermarket finned chrome-plated replacement for OEM #12361-300-000. Fits an exceptionally...
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Honda CB550K CB500K chain cover guard 40510-323-000B

1971-78 Honda CB550K / CB500K Chain Cover Guard ~ Replaces 40510-323-000B

$219.95 USD
73-0001
Restore the original look and protection of your motorcycle’s drive chain with this Chain Cover Guard, designed as a direct replacement for the factory...
Honda CB550F CB550K cylinder head breather cover 12320-374-000

1974-78 Honda CB550F / CB550K Cylinder Head Breather Cover ~ Genuine Honda 12320-374-000

$129.95 USD
99-5158
This genuine Honda cylinder head breather cover mounts on the cylinder head cover and is part of the engine breather system on Honda CB550...
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1978 Honda CB550K · Engine Covers & Accessories Buying guide

Compare the cover position and gasket statement

The tappet cap includes a gasket, the breather cover expressly excludes one, and the points-cover description separately mentions hardware. Identify the required mounting position before choosing by finish or combining these individual purchases.

Parts to consider

Honda CB Chrome Points Cover ~ Replaces 30370-300-020 Chrome engine points coverReferences 30370-300-020 and 30370-323-000; its listing mentions separately available hardware.View part Honda CB Valve Tappet Cover / Rocker Cap ~ Replaces 12361-300-000 Finned chrome tappet cap with gasketAftermarket cap referencing 12361-300-000, explicitly sold each with a gasket included.View part 1974-78 Honda CB550F / CB550K Cylinder Head Breather Cover ~ Genuine Honda 12320-374-000 Genuine Honda cylinder-head breather coverReference 12320-374-000; sold individually, with the breather-cover gasket excluded.View part

Related parts: Separately listed points-plate cover gasket

Read the cap’s own supplied-seal statement

The aftermarket finned tappet cap includes a gasket and is sold each. A separate eight-O-ring product says it works only on OEM-type tappet covers. Compare the cap actually fitted and its own gasket requirement before treating the stock-type O-ring package as a seal choice for a custom cap.

Plan the breather cover and gasket separately

The genuine Honda breather cover is described as one per motorcycle, sold individually, with its gasket not included. Compare the fitted cover and the required sealing component before buying. That explicit exclusion is different from the tappet cap’s supplied gasket and should remain part of the order check.

Common ordering questions

Does the finned tappet cap include its gasket?

Yes. The description identifies an aftermarket finned chrome cap sold individually with a new gasket included. Compare its mounting position and supplied seal with the part being replaced before adding another gasket for the same cap.

Are the separate tappet O-rings described for every cap style?

The eight-O-ring listing expressly limits them to OEM-type tappet covers. Identify the cover style on the engine before choosing those seals, particularly where custom finned caps have replaced the original-type components.

What is stated about points-cover hardware?

The chrome points-cover description says new hardware is available separately. Compare the mounting pieces required and the cover’s listed references before planning the order; that note does not identify a supplied hardware package with the cover.

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