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Honda CB Engine Gaskets, Oil Seals & Hardware

Find Honda CB engine gaskets, oil seals and hardware for maintenance, leak repairs and engine rebuilding. Shop cover gaskets, gasket sets, O-rings, oil seals, washers, plugs, fasteners and related sealing components. Select your Honda CB model above to narrow the collection to products listed for your bike.

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Most orders ship same or next business day Fitment guarantee Listed for your exact model and year? We’ll make it right if it doesn’t fit as described. Mechanic-backed support Ask our team for help choosing the right Honda CB part.
Currently viewing Gaskets & Oil Seals & Engine Hardware

Honda motorcycle parts

Choose your model and year to see parts listed for your bike.

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Honda CB750F CB750K high performance kibblewhite cylinder studs

1969-77 Honda CB750F / CB750K High Performance Kibblewhite Cylinder Studs

$249.95 USD
18-7007
Upgrade your SOHC CB750's cylinder studs with this Kibblewhite Black Oxide Cylinder Studs Set of 16. Made in the USA by Kibblewhite. Manufactured from...
Honda CB750 cylinder head gasket 12251-300-050

1969-78 Honda CB750 Cylinder Head Gasket ~ Replaces 12251-300-050

$119.95 USD
18-7002
Replace your SOHC CB750's cylinder head gasket with this Premium Athena Brand Cylinder Head Gasket, replacing OEM #12251-300-050.Key Features• Premium Athena cylinder head gasket•...
New
Honda CB900C CB900F overhaul gasket set

1980-82 Honda CB900C / CB900F Overhaul Gasket Set

$114.95 USD
18-0099
Rebuild your CB900C Custom or CB900F Supersport engine with this Engine Overhaul Gasket Set.Key Features• Engine overhaul gasket setFitment / Compatibility• Honda CB900C (1980‑82)...
New
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...
Honda CB750F CB750K countershaft sprocket oil seal 29.8 x 62 x 7 91205-405-005

1977-78 Honda CB750F / CB750K Countershaft Sprocket Oil Seal ~ 29.8 x 62 x 7 ~ Replaces 91205-405-005

$19.95 USD
73-0957
Replace your countershaft sprocket oil seal with this Countershaft Sprocket Oil Seal, 29.8 x 62 x 7, replacing OEM #91205-405-005. High-quality, made in Japan.Key...
Honda CB750K cylinder head gasket 12251-300-050

1969-73 Honda CB750K Cylinder Head Gasket ~ Replaces 12251-300-050

$42.95 USD
18-6990
Replace your earliest SOHC CB750K cylinder head gasket with this Cylinder Head Gasket, replacing OEM #12251-300-050. Fits the 1969-73 CB750K.Key Features• Cylinder head gasket•...
Honda CB750F CB750K high performance kibblewhite cylinder stud nuts pk 16

1969-77 Honda CB750F / CB750K High Performance Kibblewhite Cylinder Stud Nuts Pk/16

$189.95 USD
18-7005
Upgrade your SOHC CB750's cylinder stud nuts with this Kibblewhite Black Oxide Cylinder Stud Nuts Set of 16. Made in the USA by Kibblewhite,...
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Honda CB900C CB900F Athena gasket set (top end set only)

1980-82 Honda CB900C / CB900F Athena Gasket Set (Top End Set Only)

$169.95 USD
18-0433
Freshen up the top end of your CB900C or CB900F with this Athena Top End Gasket Set. Athena of Italy is an original-equipment supplier...
Honda CB650SC CB550SC Athena overhaul gasket set

1983-85 Honda CB650SC / CB550SC Athena Overhaul Gasket Set

$229.95 USD
18-0108
Rebuild your CB550SC or CB650SC Nighthawk engine with this Athena Overhaul Engine Gasket Set. Athena of Italy is an original-equipment supplier to Yamaha, Honda,...
Honda CB750 engine oil seal kit made in japan with 7 seals 91205-405-005

1977-78 Honda CB750 Engine Oil Seal Kit

$34.95 USD
01-9042
Seal up your 1977-78 CB750 rebuild with this 7-piece Engine Oil Seal Kit, superior OEM quality and made in Japan. Purpose-built for the late-'70s...
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 CB1100 CB1000 CB900 CB750 oil pump shaft seal 25 x 47 x 10 91257-425-013

Honda CB1100 / CB1000 / CB900 / CB750 Oil Pump Shaft Seal ~ 25 x 47 x 10 ~ Replaces 91257-425-013

$13.95 USD
73-0967
Replace your oil pump shaft seal with this Oil Pump Shaft Seal, 25 x 47 x 10, replacing OEM #91257-425-013. High-quality, made in Japan.Key...
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Honda CB750A gear select case gasket 11396-393-306

1976-78 Honda CB750A Gear Select Case Gasket ~ Replaces 11396-393-306

$11.61 USD
18-7021
Replace your CB750A Hondamatic's gear select case gasket with this Gear Select Case Gasket, replacing OEM #11396-393-306.Key Features• Gear select case gasket• Replaces OEM...
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Honda CB750A left crankcase to oil pump gasket 11395-393-306

1976-78 Honda CB750A Left Crankcase to Oil Pump Gasket ~ Replaces 11395-393-306

$7.71 USD
18-7019
Replace your CB750A Hondamatic's left crankcase to oil pump gasket with this Left Crankcase to Oil Pump Gasket, replacing OEM #11395-393-306.Key Features• Left crankcase...
Honda CB750 oil pump gasket 15135-300-010

1969-78 Honda CB750 Oil Pump Gasket ~ Replaces 15135-300-010

$6.60 USD
18-7008
Replace your SOHC CB750 oil pump gasket with this Oil Pump Gasket, replacing OEM #15135-300-010.Key Features• Oil pump gasket• Replaces OEM #15135-300-010• Honda part...
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Honda CB650SC CB550SC valve cover gasket 12391-ME5-306

1983-85 Honda CB650SC / CB550SC Valve Cover Gasket ~ Replaces 12391-ME5-306

$39.95 USD
12-1023
Replace your Nighthawk valve cover gasket with this Fibre-Type Valve Cover Gasket, replacing OEM #12391-ME5-306 / #12391-ME5-000. Fits the CB650SC (1983-85) and CB550SC (1983)...
Honda CB125 CB100 oil pump gasket 15126-107-020

Honda CB125 / CB100 Oil Pump Gasket ~ Replaces 15126-107-020

$2.95 USD
73-1196
Ensure a secure, leak-free seal during your engine rebuild or maintenance with this Oil Pump Gasket. Precisely engineered to replace OEM# 15126-107-020, this gasket...
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 CB650C CB650SC cylinder head gasket 12251-426-306

1979-82 Honda CB650 / CB650C / CB650SC Cylinder Head Gasket ~ Replaces 12251-426-306

$59.95 USD
18-6992
Replace your CB650 cylinder head gasket with this Cylinder Head Gasket, replacing OEM #12251-426-306.Key Features• Cylinder head gasket• Replaces OEM #12251-426-306• Honda part name:...
Honda CB650 CB650C CB650SC overhaul gasket set

1979-82 Honda CB650 / CB650C / CB650SC Overhaul Gasket Set

$139.95 USD
18-0440
Rebuild your CB650 engine with this Overhaul Engine Gasket Set.Key Features• Overhaul engine gasket setFitment / Compatibility• Honda CB650 (1979‑82)• CB650C (1980‑81) Custom• CB650SC...
Honda CB650 CB650C CB650SC Athena overhaul gasket set

1979-82 Honda CB650 / CB650C / CB650SC Athena Overhaul Gasket Set

$179.95 USD
18-0202
Rebuild your CB650 engine with this Athena Overhaul Engine Gasket Set. Athena of Italy is an original-equipment supplier to Yamaha, Honda, Kawasaki, Suzuki, and...
Honda CB900C CB900F Athena overhaul gasket set

1980-82 Honda CB900C / CB900F Athena Overhaul Gasket Set

$229.00 USD
18-0116
Rebuild your CB900C or CB900F engine with this Athena Overhaul Gasket Set. Athena of Italy is an original-equipment supplier to Yamaha, Honda, Kawasaki, Suzuki,...
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Honda CB400 Athena overhaul gasket set

1978-81 Honda CB400 Athena Overhaul Gasket Set

$119.95 USD
18-0103
Rebuild your CB400 engine with this Athena Overhaul Engine Gasket Set. Athena of Italy is an original-equipment supplier to Yamaha, Honda, Kawasaki, Suzuki, and...
New
Honda CB125S overhaul gasket set

1973-75 Honda CB125S Overhaul Gasket Set

$32.95 USD
18-0097
Perform a complete engine overhaul on your CB125S with this Engine Overhaul Gasket Set.Key Features• Engine overhaul gasket setFitment / Compatibility• Honda CB125S (1973‑75)Part...
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Honda CB Gaskets and Seals for Reliable Engine Repairs

Engine gaskets, O-rings and oil seals keep oil inside the engine while preventing dirt and moisture from entering critical areas. Heat, age, repeated disassembly and hardened sealing materials can lead to leaks around engine covers, shafts, oil passages and mating surfaces. Replacing the correct seal or gasket during service helps produce a cleaner, more dependable repair.

This collection includes Honda CB engine-cover gaskets, complete and partial gasket sets, shaft seals, valve-related seals, O-rings, sealing washers, plugs, fasteners and other engine hardware. When completing more extensive work, browse our piston and ring sets and Honda CB valvetrain parts for related internal engine components.

For timing-system service, see our camshaft drive parts. Replacement covers and related exterior components are available in engine covers and accessories. Honda changed gasket shapes, shaft diameters, bolt patterns and sealing arrangements between models and production years, so use the My Motorcycle selector to narrow the results before choosing components for your repair.

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