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1983 Honda CB550SC Overhaul & Valve-Cover Gaskets

For the 1983 Honda CB550SC Nighthawk, this category offers an Athena overhaul gasket set and a separate fibre valve-cover gasket. Start with the area being opened: a cover-only purchase has a clearer stated scope than an unitemized overhaul set.

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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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1983 Honda CB550SC · Gaskets Buying guide

Choose between cover work and a broader gasket purchase

The valve-cover gasket lists two Honda replacement references and is supplied on its own. The Athena listing names the CB550SC application but does not provide a piece-by-piece contents list for its overhaul set.

Parts to consider

1983-85 Honda CB650SC / CB550SC Valve Cover Gasket ~ Replaces 12391-ME5-306 Nighthawk fibre valve-cover gasketMain gasket replacing 12391-ME5-306 and 12391-ME5-000. Explicitly listed for the 1983 CB550SC; the description does not name bolt seals or grommets among its contents.View part 1983-85 Honda CB650SC / CB550SC Athena Overhaul Gasket Set Athena engine overhaul gasket setGasket set for the 1983 CB550SC and 1983–85 CB650SC Nighthawks. The written listing does not itemize its individual pieces.View part

Choose by the work’s scope

The separate cover gasket is a useful choice when that is the only gasket you intend to replace. It is listed as one fibre-type main gasket, without bolt seals or grommets. Build the remaining parts list separately instead of assuming the cover purchase supplies them.

Ask for the overhaul set’s contents

The Athena set is explicitly described for the 1983 CB550SC and 1983–85 CB650SC Nighthawks. Its text does not name every gasket or seal in the package. Check the supplied contents against your planned work before treating it as a complete list of engine sealing parts.

Gasket questions

Which Honda numbers identify the separate cover gasket?

The fibre-type gasket replaces 12391-ME5-306 and 12391-ME5-000. The listing specifically names the 1983 CB550SC, so compare those references and the gasket outline with the cover fitted to your motorcycle.

Are sealing washers or grommets included?

No. The separate valve-cover product contains the main gasket only. Its source text excludes bolt seals or grommets, so account for any such parts separately when planning the cover work.

Does the Athena set include this valve-cover gasket?

The overhaul listing does not provide an itemized contents list. Confirm the specific valve-cover gasket and any other required sealing pieces with the set’s supplied contents before assuming they are included.

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