VintageCB750 Supplying CB Riders Since 2010

About Us Why Us? Reviews Shipping Info Returns Contact Us
Wish Lists
0 My Cart

Your cart is currently empty.

Browse all parts
Total (USD): $0.00
View cart
Menu
Search
Wish
Cart 0
My motorcycle Choose your Honda CB model

Search parts

Searching all Honda CB parts

Example: brake pads or oil filter.

1983 Honda CB1000C Engine Gaskets, Oil Seals & Hardware

For the 1983 Honda CB1000C, sealing parts are listed one cover at a time: valve cover, oil pan, clutch, left crankcase, alternator, spark advancer and starter motor cover gaskets, plus a 6-piece oil seal kit and separate shaft seals printed with their sizes.

Close ×
Your saved bike Choose your Honda CB model

Shop By Category

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.

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,...
Sold out
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...
Sold out
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...
Sold out
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 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 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...
compare

1983 Honda CB1000C · Gaskets & Oil Seals Buying guide

Match the leak to the joint being repaired

Start with the exact cover or shaft that is leaking. The CB1000C listings include molded cover seals, flat cover gaskets and sized shaft seals; these serve different joints. Check the sealing surface and surrounding hardware as well as the old rubber or gasket.

Gaskets and seals to consider

1979-83 Honda CB750 / CB900 / CB1000C Engine Oil Seal Kit Engine oil seal kit, 6 piecesOne each of six shaft seals, from 4.8 x 14.5 x 5 up to 40 x 62 x 13.View part Honda CB1100 / CB1000 / CB900 / CB750 Valve Cover Gasket ~ Replaces 12391-425-010 Valve cover gasketCam cover gasket listed for the DOHC CB750, CB900, CB1000C and CB1100F.View part Honda CB1100 / CB1000 / CB900 / CB750 Oil Pan Gasket ~ Replaces 11398-425-306 Oil pan gasketLists the CB1000C with the CB750A, the 1979-82 CB750 family and CB900.View part

Related parts: Shift shaft oil seal · Tach drive oil seal · Alternator cover gasket

What the six-piece seal kit covers

The kit supplies the tach-drive, clutch-arm, crankshaft, oil-pump, countershaft and shift-shaft seals. Cover gaskets and valve-stem seals are separate. For a single leak, compare the individual seal with the kit contents; for wider engine work, use the service procedure to build the complete sealing list.

Keep hardware and gasket functions separate

The 71-piece DOHC screw set is carburetor hardware, despite appearing in this category. For engine covers, match each bolt to its original position and length. The separate 90541-425-000 cam-cover seal listing mixes an SOHC description with DOHC fitment; confirm the actual seal and reference before ordering from that description alone.

Gasket and seal questions

Why can a new shaft seal start leaking again?

A worn shaft surface, excessive shaft movement or a damaged installation can defeat a new seal. Inspect the mating surface and bearing support, protect the lip from sharp edges, and use Honda’s installation direction and method. Replacing rubber alone does not repair a worn shaft or housing.

The countershaft seal is listed as both 13mm and 13.5mm wide. Which should I buy?

The kit describes its 91205-425-003 seal as 40 × 62 × 13mm; the separate seal describes 40 × 62 × 13.5mm for the same reference. Confirm the supplied seal specification with the seller against the removed part and the CB1000C application before ordering. Do not assume the different widths are interchangeable.

Not sure which part you need?

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

Ask a fitment question
Parts categories for 1983 Honda CB1000C

Your cart

×