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1978 Honda CB550K Engine Service & Rebuild Parts

An engine order for the 1978 Honda CB550K can range from a paper filter to a gasket set or piston kit. Make a list of the components actually needed, then distinguish routine service items from the packages and individual parts used in a rebuild.

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Honda motorcycle parts

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Honda CB750 CB650 CB550 tach drive plug block off black joker machine

Honda CB Tach Drive Plug Block Off ~ Black ~ Joker Machine

$39.95 USD
73-1075
Block off your tach drive cleanly with this Joker Machine Brand Black Tach Drive Plug (Block Off). This plug is generally used when the...
Honda CB550F CB550K CB500K Honda cam chain guide 14611-323-000

1971-78 Honda CB550F / CB550K / CB500K Genuine Honda Cam Chain Guide ~ OEM 14611-323-000

$84.95 USD
99-5096
Upgrade or restore your classic Honda motorcycle with this genuine Honda Cam Chain Guide — precision‑engineered and made in Japan. This authentic replacement fits...
Honda CB650 CB550 CB500 cam chain tensioner damper 14501-323-000

Honda CB Genuine Honda Cam Chain Tensioner Damper ~ OEM 14501-323-000

$16.95 USD
99-5288
Upgrade or restore your classic Honda motorcycle with this Genuine Honda Cam Chain Tensioner Damper — precision‑engineered and made in Japan. This authentic OEM...
New
Honda CB550F CB550K standard size (58.5 mm) piston kit includes piston, rings, pin and clips

1974-78 Honda CB550F / CB550K Standard Size (58.5 mm) Piston Kit ~ Includes Piston, Rings, Pin & Clips

$49.95 USD
99-4870
Upgrade or rebuild your classic Honda motorcycle engine with this Standard Size (58.5 mm) Piston Kit — complete with piston, piston rings, piston pin, and...
Honda CB650 CB550 CB500 CB400 CB350 primary chain 23131-426-003

Honda CB Primary Chain ~ Replaces 23131-426-003

$179.95 USD
73-0162
Replace your CB primary chain with this OEM-Quality Primary Chain, 50 link, replacing OEM #23131-426-003 / #23131-323-003.Key Features• Primary chain, OEM quality• 50 link•...
Honda CB550F CB550K CB500K cylinder head gasket 12251-374-306

1971-78 Honda CB550F / CB550K / CB500K Cylinder Head Gasket ~ Replaces 12251-374-306

$69.95 USD
18-6996
Replace your CB500K or CB550 cylinder head gasket with this Cylinder Head Gasket, replacing OEM #12251-374-306.Key Features• Cylinder head gasket• Replaces OEM #12251-374-306• Honda...
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Honda CB650 CB550 performance kibblewhite valve stem seal set 12209-333-005

Honda CB High Performance Kibblewhite Valve Stem Seal Set ~ Replaces 12209-333-005

$49.95 USD
12-0083
Fit premium Viton valve stem seals with this Kibblewhite 100% Viton Valve Stem Seal Set of 8, replacing OEM #12209-333-005. Made in the USA....
1976-78 Honda CB550K / CB550F Cylinder Base Gasket ~ Replaces Honda OEM 11394-390-306

1976-78 Honda CB550K / CB550F Cylinder Base Gasket ~ Replaces Honda OEM 11394-390-306

$17.41 USD
18-6998
Honda CB550F CB550K Clutch Cover Gasket - Replaces Honda OEM 11394-390-306. This clutch cover gasket seals the clutch cover to the engine side cover...
New
Honda CB550 CB500 CB400 CB350 primary drive rubber damper 23114-323-000

Honda CB550 / CB500 / CB400 / CB350 Primary Drive Rubber Damper ~ Genuine Honda 23114-323-000

$12.50 USD
99-5134
This genuine Honda primary drive rubber damper cushions the primary drive assembly inside select classic Honda CB four-cylinder engines. It helps absorb vibration, drivetrain...
New
Honda CB650 CB550 CB500 piston pin 13111-440-000

Honda CB Genuine Honda Piston Pin ~ OEM 13111-440-000 / 13111-286-000

$18.95 USD
99-5321
Upgrade or restore your classic Honda motorcycle with this Genuine Honda Piston Pin — precision‑engineered and made in Japan. This authentic replacement fits and...
Honda CB550F CB550K CB500K CB500 550 cam chain tensioner 14500-323-000

1971-78 Honda CB550F / CB550K / CB500K CB500/550 Cam Chain Tensioner ~ Honda OEM 14500-323-000/010

$319.95 USD
99-5447
Cam chain tensioner designed to match Honda OEM reference 14500-323-010. Keeps proper tension on the cam chain to support consistent valve timing and smooth...
Honda CB750 CB550 drive chain adjuster screws black joker machine 90119-283-000

Honda CB Drive Chain Adjuster Screws ~ Black ~ Joker Machine ~ Replaces 90119-283-000

$59.95 USD
73-1059
Refresh your drive chain adjusters with these Joker Machine Brand Black Custom Type Drive Chain Adjuster Screws, set of 2, with gold-cadmium-plated nuts. Replaces...
Honda CB550F CB550K CB500K cylinder head cover gasket 12391-323-000

1971-78 Honda CB550F / CB550K / CB500K Cylinder Head Cover Gasket ~ Replaces 12391-323-000

$41.95 USD
18-6997
Replace your CB500K or CB550 cylinder head cover gasket with this Cylinder Head Cover Gasket, replacing OEM #12391-323-000.Key Features• Cylinder head cover gasket• Replaces...
Honda CB650 CB550 CB500 cylinder base gasket 12191-426-306

Honda CB650 / CB550 / CB500 Cylinder Base Gasket ~ Replaces 12191-426-306

$18.50 USD
18-6993
Replace your CB650 or CB500/CB550 cylinder base gasket with this Cylinder Base Gasket, replacing OEM #12191-426-306.Key Features• Cylinder base gasket• Replaces OEM #12191-426-306• Honda...
Honda CB550F CB550K Athena overhaul gasket set

1974-78 Honda CB550F / CB550K Athena Overhaul Gasket Set

$179.95 USD
18-0198
Rebuild your CB550 engine with this Athena Overhaul Engine Gasket Set. Athena of Italy is an original-equipment supplier to Yamaha, Honda, Kawasaki, Suzuki, and...
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...
Honda CB550F CB550K CB500K Athena gasket set (top end set only)

1971-78 Honda CB550F / CB550K / CB500K Athena Gasket Set (Top End Set Only)

$144.95 USD
18-0435
Freshen up the top end of your CB500 or CB550 with this Athena Top End Gasket Set. Athena of Italy is an original-equipment supplier...
Honda CB550F CB550K CB500K high performance kibblewhite black diamond intake valve 14711-107-020

1971-78 Honda CB550F / CB550K / CB500K High Performance Kibblewhite Black Diamond Intake Valve

$79.95 USD
12-0080
Upgrade your CB500/CB550 intake with this Kibblewhite Black Diamond Intake Valve, replacing OEM #14711-107-020. Stainless steel valves impregnated by a special German process to...
Honda CB550F CB550K CB500K high performance kibblewhite black diamond exhaust valve 14721-323-005

1971-78 Honda CB550F / CB550K / CB500K High Performance Kibblewhite Black Diamond Exhaust Valve

$79.95 USD
12-0081
Match your CB500/CB550 intake with this Kibblewhite Black Diamond Exhaust Valve, replacing OEM #14721-323-005. Same Black Diamond process as our intake valves: stainless steel...
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1978 Honda CB550K · Engine Buying guide

Turn the repair list into the right packages

The available engine parts include stock-type service pieces, gasket sets and separately identified internal components. Read the contents of each purchase so a broad rebuild name does not replace a component-by-component comparison.

Parts to consider

Honda CB Oil Filter ~ Replaces 15410-426-010 Stock-type paper oil filterPaper element referencing 15410-426-010 and 15410-422-004; housing pieces are separately offered.View part 1974-78 Honda CB550F / CB550K Athena Overhaul Gasket Set Athena engine overhaul gasket setGasket-set option listed for the CB550K; confirm the specific gaskets required for the repair.View part 1974-78 Honda CB550F / CB550K Standard Size (58.5 mm) Piston Kit ~ Includes Piston, Rings, Pin & Clips 58.5 mm standard-size piston kitOne-piston package with piston, rings, pin and a pair of pin clips.View part

Related parts: Nine-piece engine oil-seal kit · Separately listed Honda cam-chain guide

Check the rebuild package against your actual list

The piston kit supplies the named components for one piston, while the Athena product is an engine gasket set. These are different purchases. Check the assessed engine, required dimensions and repair scope before combining them, then identify oil seals or other separately listed parts still needed.

Identify the oil-filter arrangement before buying service parts

The paper element is described as stock type, with O-rings, springs and washers available separately. The chrome spin-on product replaces the original housing, bolt and paper element arrangement. Look at the fitted assembly first so the filter and associated parts in the order match the setup being retained.

Common ordering questions

Is the piston kit a full-engine package?

Its description says the kit rebuilds one piston and lists piston, rings, pin and a pair of clips. Determine the number of pistons involved in the planned work rather than reading the engine application as a four-piston sales package.

Does a gasket set establish which oil seals are supplied?

The Athena overhaul description identifies a gasket set without itemizing an oil-seal package. The separate nine-piece seal kit names its sealing positions. Check both products against the required parts before assuming a gasket purchase supplies those oil seals.

How do I choose between similarly named engine components?

Start with the removed part, its position and the listed replacement reference. A cam-chain guide, slipper, tensioner and damper are separately described components. Identify the required piece before selecting a replacement from the broader engine assortment.

Not sure which part you need?

Send your model and year, plus photos of your existing part and any changes to the original setup.

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