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1985 Honda CB650SC Nighthawk Engine Gaskets

Choose gaskets by the engine joint you need to reopen on your 1985 Nighthawk. The separate valve-cover gasket and Athena overhaul set serve different repair scopes; compare the fitted cover and confirm the set contents before ordering.

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Currently viewing Gaskets & Oil Seals & Engine Hardware

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Honda CB650SC CB550SC Athena overhaul gasket set

1983-85 Honda CB650SC / CB550SC Athena Overhaul Gasket Set

$229.95 USD
18-0108
1983 Honda CB550SC Nighthawk Motorcycle Parts 1983 Honda CB650SC Nighthawk Motorcycle Parts 1984 Honda CB650SC Nighthawk Motorcycle Parts 1985 Honda CB650SC Nighthawk Motorcycle Parts Honda CB Engine Gaskets, Oil Seals & Hardware Honda CB Engine Parts Honda CB550 Motorcycle Parts by Model & Year Honda CB550SC Nighthawk Motorcycle Parts (1983–1984) Honda CB650 Motorcycle Parts by Model & Year Honda CB650SC Nighthawk Motorcycle Parts (1982–1985) Series 5: CB650 (79-82) Series 6: CB500-CB550 (71-78)
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,...
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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
1983 Honda CB550SC Nighthawk Motorcycle Parts 1983 Honda CB650SC Nighthawk Motorcycle Parts 1984 Honda CB650SC Nighthawk Motorcycle Parts 1985 Honda CB650SC Nighthawk Motorcycle Parts Honda CB Engine Gaskets, Oil Seals & Hardware Honda CB Engine Parts Honda CB550 Motorcycle Parts by Model & Year Honda CB550SC Nighthawk Motorcycle Parts (1983–1984) Honda CB650 Motorcycle Parts by Model & Year Honda CB650SC Nighthawk Motorcycle Parts (1982–1985) Series 5: CB650 (79-82) Series 6: CB500-CB550 (71-78)
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)...
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1985 Honda CB650SC Nighthawk · Engine Gaskets Buying guide

Choose a cover repair or wider gasket work

The useful distinction here is a single valve-cover repair versus a larger engine strip. Match the repair first, then check which gasket coverage the chosen product supplies.

Parts to consider

1983-85 Honda CB650SC / CB550SC Valve Cover Gasket ~ Replaces 12391-ME5-306 Valve-cover replacement gasketLate CB650SC application with Honda references 12391-ME5-306 and 12391-ME5-000.View part 1983-85 Honda CB650SC / CB550SC Athena Overhaul Gasket Set Athena engine gasket setOverhaul gasket option for the CB650SC; verify itemized contents for your job.View part

Start with the leaking joint

Trace the source of the leak before committing to a larger gasket order. If the work is confined to the valve cover, compare the replacement gasket with that cover. Do not assume another CB650 generation uses the same outline.

Check contents before dismantling

An overhaul gasket set is useful when the repair crosses several engine joints. Its listing does not itemize every gasket or seal. Confirm those contents against the planned work so a missing service item does not interrupt reassembly.

Ordering questions

Should I order the cover gasket as well as the overhaul set?

Check the set contents first. Order the separate cover gasket if it is needed for your repair and not already supplied; the set name alone does not settle that question.

Will this cover gasket suit a changed engine or cover?

Compare the fitted engine and cover with the stated late-Nighthawk application and Honda references. Registration year alone is insufficient if the motorcycle has received replacement engine components.

Are oil seals confirmed in the Athena set?

The available contents are not itemized sufficiently to promise particular oil seals. Confirm the exact seal you need before relying on the set for that part of the repair.

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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