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1981 Honda CB750K Engine Gaskets, Oil Seals & Hardware

An oil leak and an engine teardown call for different shopping lists. This category brings together individual cover gaskets, top-end and overhaul sets, shaft seals and small engine sealing parts for the 1981 Honda CB750K. Match the contents to the joint you are repairing.

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Currently viewing Gaskets & Oil Seals & Engine Hardware

Honda motorcycle parts

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Honda CB1100 CB1000 CB900 CB750 alternator cover gasket 11691-425-000

Honda CB1100 / CB1000 / CB900 / CB750 Alternator Cover Gasket ~ Replaces 11691-425-000

$12.64 USD
12-5008
Replace the alternator cover gasket on your DOHC CB with this Alternator Cover Gasket, replacing OEM #11691-425-000. Fits the 1979-82 CB750 family, CB750SC Nighthawk,...
Honda CB1100 CB1000 CB900 CB750 valve cover gasket 12391-425-010

Honda CB1100 / CB1000 / CB900 / CB750 Valve Cover Gasket ~ Replaces 12391-425-010

$32.95 USD
12-1002
Replace your DOHC CB's valve cover gasket with this Valve Cover Gasket, replacing OEM #12391-425-010. Fits the 1979-82 CB750 family, CB750SC Nighthawk, CB900 family,...
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Honda CB1100 CB1000 CB900 CB750 left crankcase cover gasket 11395-425-306

Honda CB1100 / CB1000 / CB900 / CB750 Left Crankcase Cover Gasket ~ Replaces 11395-425-306

$14.95 USD
18-7055
Replace your DOHC CB's left crankcase (generator) cover gasket with this Generator Cover Gasket, replacing OEM #11395-425-306.Key Features• Left crankcase / generator cover gasket•...
Honda CB1100 CB1000 CB900 CB750 oil pan gasket 11398-425-306

Honda CB1100 / CB1000 / CB900 / CB750 Oil Pan Gasket ~ Replaces 11398-425-306

$15.94 USD
18-7053
Replace your DOHC CB's oil pan gasket with this Oil Pan Gasket, replacing OEM #11398-425-306. Broad fitment across the CB750A Hondamatic, full 1979-82 CB750...
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Honda CB1100 CB1000 CB900 exhaust headpipe gasket (each) 18291-MM5-860

Honda CB Exhaust Headpipe Gasket (Each) ~ Replaces 18291-MM5-860

$6.84 USD
18-7013
Replace one cylinder-head-to-exhaust-headpipe gasket on your big-bore Honda with this Cylinder Head to Exhaust Headpipe Gasket, 1 piece, replacing OEM #18291-MM5-860. Exceptionally broad fitment...
Honda CB1100 CB1000 CB900 CB750 clutch cover gasket 11396-425-306

Honda CB1100 / CB1000 / CB900 / CB750 Clutch Cover Gasket ~ Replaces 11396-425-306

$22.95 USD
12-5042
Rebuild your DOHC CB's clutch cover with this Clutch Cover Gasket, replacing OEM #11396-425-306. Fits the 1979-82 CB750 family, CB750SC Nighthawk, CB900 family, CB1000C,...
Honda CB1100 CB1000 shift shaft oil seal 12.5 x 25 x 8 91204-425-003

Honda CB Shift Shaft Oil Seal ~ 12.5 x 25 x 8 ~ Replaces 91204-425-003

$4.61 USD
73-0968
Replace your shift shaft oil seal with this Shift Shaft Oil Seal, 12.5 x 25 x 8, replacing OEM #91204-425-003. High-quality, made in Japan.Key...
Honda CB1100 CB1000 CB900 CB750 spark advancer cover gasket 30372-425-000

Honda CB1100 / CB1000 / CB900 / CB750 Spark Advancer Cover Gasket ~ Replaces 30372-425-000

$7.95 USD
18-7059
Replace your DOHC CB's spark advancer cover gasket with this Spark Advancer Cover Gasket (rubber O-ring), replacing OEM #30372-425-000.Key Features• Spark advancer cover gasket...
Honda CB1100 CB1000 tach drive oil seal 4.8 x 14.5 x 5 91256-425-003

Honda CB Tach Drive Oil Seal ~ 4.8 x 14.5 x 5 ~ Replaces 91256-425-003

$4.95 USD
73-0964
Replace your tach drive oil seal with this Tach Drive Oil Seal, 4.8 x 14.5 x 5, replacing OEM #91256-425-003. High-quality, made in Japan.Key...
Honda CB1100 CB1000 CB900 CB750 DOHC screw set

Honda CB1100 / CB1000 / CB900 / CB750 DOHC Screw Set

$39.95 USD
73-0099
Refresh DOHC carb hardware top to bottom with this 71-Piece DOHC Screw Set. Includes front stay plate screws (8), CV cap screws (8), throttle...
Honda CB750 CB900 CB1000C engine oil seal kit made in japan with 6 seals 91256-425-003

1979-83 Honda CB750 / CB900 / CB1000C Engine Oil Seal Kit

$44.95 USD
01-9034
Seal up your DOHC-era CB's engine rebuild with this 6-piece Engine Oil Seal Kit. Superior OEM quality, made in Japan, and built for the...
Honda CB1100 CB1000 CB900 CB750 camshaft holder seal 91311-425-000

Honda CB1100 / CB1000 / CB900 / CB750 Camshaft Holder Seal ~ Replaces 91311-425-000

$5.50 USD
18-7066
Replace your DOHC CB's camshaft holder seal with this Camshaft Holder Rubber Seal (triangular piece with rounded corners), replacing OEM #91311-425-000. One piece required...
Honda CB750 DOHC Athena overhaul gasket set

1979-83 Honda CB750 DOHC Athena Overhaul Gasket Set

$199.95 USD
18-0109
Rebuild your DOHC CB750 engine with this Athena Overhaul Gasket Set. Athena of Italy is an original-equipment supplier to Yamaha, Honda, Kawasaki, Suzuki, and...
Honda CB750C CB750K CB750L exhaust manifold stud 90035-425-000

1979-82 Honda CB750C / CB750K / CB750L Exhaust Manifold Stud ~ Replaces 90035-425-000

$4.45 USD
73-0988
Replace your exhaust manifold stud with this Exhaust Manifold Stud, 8mm x 55mm, replacing OEM #90035-425-000.Key Features• Exhaust manifold stud• 8mm x 55mm• Replaces...
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Honda CB750 CB900 CB650 cam cover seal 90541-425-000

Honda CB750 / CB900 / CB650 Cam Cover Seal

$11.95 USD
01-0116
Keep oil where it belongs with this Cam Cover Seal, a direct replacement for OEM #90541-425-000. Fits a wide range of late-'70s through early-'80s...
Honda CB750 DOHC overhaul gasket set

1979-83 Honda CB750 DOHC Overhaul Gasket Set

$159.95 USD
18-0443
Rebuild your DOHC CB750 engine with this Overhaul Engine Gasket Set.Set contains: 12-1002 Valve Cover Gasket, 18-7051 Cylinder Head Gasket, 18-7052 Cylinder Base Gasket,...
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Honda CB900 CB750 cylinder head gasket Athena premium quality 12251-438-023

1979-82 Honda CB900 / CB750 Cylinder Head Gasket ~ Athena Premium Quality ~ Replaces 12251-438-023

$74.95 USD
18-7000
Replace your DOHC CB's cylinder head gasket with this Athena Premium Quality Cylinder Head Gasket, replacing OEM #12251-438-023.Key Features• Athena premium cylinder head gasket•...
Honda CB1100 CB1000 CB900 CB750 countershaft oil seal 40 x 62 x 13.5 91205-425-003

Honda CB1100 / CB1000 / CB900 / CB750 Countershaft Oil Seal ~ 40 x 62 x 13.5 ~ Replaces 91205-425-003

$14.95 USD
73-0969
Replace your countershaft oil seal with this Countershaft Oil Seal, 40 x 62 x 13.5, replacing OEM #91205-425-003. High-quality, made in Japan.Key Features• Countershaft...
Honda CB1100 CB1000 CB900 CB750 starter motor cover gasket 31282-425-300

Honda CB1100 / CB1000 / CB900 / CB750 Starter Motor Cover Gasket ~ Replaces Honda OEM 31282-425-300

$11.69 USD
18-7070
Starter Motor Cover Gasket ~ Replaces Honda OEM 31282-425-300 for the Honda CB models listed below. Use this part for repair, restoration, or replacement...
Honda CB900 CB750 cylinder base gasket Athena premium quality 12191-425-306

1979-83 Honda CB900 / CB750 Cylinder Base Gasket ~ Athena Premium Quality ~ Replaces 12191-425-306

$22.18 USD
18-6991
Replace your DOHC CB's cylinder base gasket with this Athena Premium Quality Cylinder Base Gasket, replacing OEM #12191-425-306.Key Features• Athena premium cylinder base gasket•...
Honda CB750 Athena gasket set (top end set only) 12391-425-010

1979-83 Honda CB750 Athena Gasket Set (Top End Set Only) ~ Replaces 12391-425-010

$179.95 USD
18-0432
Freshen up the top end of your DOHC CB750 with this Athena Top End Gasket Set. Athena of Italy is an original-equipment supplier to...
Honda CB1100 CB1000 CB900 CB750 crankshaft seal 25 x 42 x 8 91201-425-003

Honda CB1100 / CB1000 / CB900 / CB750 Crankshaft Seal ~ 25 x 42 x 8 ~ Replaces 91201-425-003

$10.50 USD
73-0966
Replace your crankshaft seal with this Crankshaft Seal, 25 x 42 x 8, replacing OEM #91201-425-003. High-quality, made in Japan.Key Features• Crankshaft Seal• 25...
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...
Honda CB900 CB750 cylinder base gasket 12191-425-306

1979-83 Honda CB900 / CB750 Cylinder Base Gasket ~ Replaces Honda OEM 12191-425-306

$16.38 USD
18-7052
Cylinder Base Gasket ~ Replaces Honda OEM 12191-425-306 for the Honda CB models listed below. Use this part for repair, restoration, or replacement work...
Honda CB900 CB750 cylinder head gasket 12251-438-023

1979-82 Honda CB900 / CB750 Cylinder Head Gasket ~ Replaces Honda OEM 12251-438-023

$54.95 USD
18-7051
Cylinder Head Gasket ~ Replaces Honda OEM 12251-438-023 for the Honda CB models listed below. Use this part for repair, restoration, or replacement work...
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Honda CB900 CB750 cylinder sleeve o-ring gasket 91302-425-000

1979-83 Honda CB900 / CB750 Cylinder Sleeve O-Ring Gasket ~ Replaces 91302-425-000

$4.61 USD
18-7067
Replace your DOHC CB's cylinder sleeve O-rings with this Cylinder Sleeve O-Rings Set of 4, replacing OEM #91302-425-000. Four pieces required per engine.Key Features•...
compare

1981 Honda CB750K · Gaskets & Oil Seals & Engine Hardware Buying guide

Compare gasket coverage and resolve the countershaft-seal conflict

For your 1981 CB750K, use the gasket sets’ itemized contents to plan the joints being opened. Oil-seal kit 01-9034 is a separate six-shaft-seal package. Its countershaft dimensions conflict with the standalone seal listing, so confirm that component before relying on either specification.

Parts to consider

1979-83 Honda CB750 DOHC Athena Overhaul Gasket Set Athena overhaul gasket setThe itemized set includes major cover and cylinder gaskets, sixteen valve stem seals, four exhaust headpipe gaskets and four sleeve O-rings.View part 1979-83 Honda CB750 Athena Gasket Set (Top End Set Only) ~ Replaces 12391-425-010 Athena top-end gasket setA more focused set listing cylinder head and base gaskets, valve cover gasket, valve stem seals, sleeve O-rings, exhaust gaskets and camshaft holder seal.View part 1979-83 Honda CB750 / CB900 / CB1000C Engine Oil Seal Kit Six-piece engine shaft seal kitContains the listed tach drive, clutch arm, crank, oil pump shaft, countershaft and shift shaft seals. Check individual seal details when sizing a replacement.View part

Related parts: Separate valve cover gasket · Spark advancer cover O-ring · Camshaft holder rubber seal

Check cover-gasket names against their references

Athena top-end set 18-0432 lists an “Ignition Points Cover Gasket” under reference 30372-425-000. The standalone spark-advancer cover gasket uses that same reference and is described as a rubber O-ring. Use the reference to compare the included sealing part rather than inferring the motorcycle’s ignition type from a kit’s component label.

Hold the conflicting countershaft size for confirmation

Oil-seal kit 01-9034 lists its 91205-425-003 countershaft seal as 40 x 62 x 13. The standalone 73-0969 listing gives 40 x 62 x 13.5 for that same reference. Do not average the figures or assume they are interchangeable. Confirm the required specification against the fitted part before selecting either purchase.

Common questions

Does the Athena top-end set include the oil-pan gasket?

The itemized top-end set 18-0432 does not list an oil-pan gasket. Athena overhaul set 18-0109 does list oil-pan gasket 18-7053. Match the joints being opened to those contents rather than assuming “top end” and “overhaul” cover the same work.

Why does the countershaft seal have two different dimensions?

The current catalog entries conflict: kit 01-9034 gives 40 x 62 x 13, while standalone seal 73-0969 gives 40 x 62 x 13.5, both against 91205-425-003. These descriptions do not resolve the discrepancy. Provide the fitted seal’s markings and both product details so the correct specification can be confirmed.

Is the kit’s ignition-cover gasket another purchase besides the spark-advancer O-ring?

The Athena top-end set lists reference 30372-425-000, which is also the reference on the separate spark-advancer cover gasket listing. Check that included part before buying the same referenced seal again. The differing component labels alone do not establish that two separate seals are needed.

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