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1986 Honda CB700SC — Joints et quincaillerie moteur

Engine sealing on the 1986 CB700SC benefits from a location-by-location parts list. Cover mounting seals, an overhaul gasket set and headpipe gaskets are different choices. Find the leaking joint or planned dismantling boundary, then compare contents and individual quantities before ordering.

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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...
Épuisé
Honda CB700SC Athena overhaul gasket set

1984-86 Honda CB700SC Athena Overhaul Gasket Set

$239.00 USD
18-0377
Rebuild your late-model Nighthawk engine with this Athena Overhaul Gasket Set. Athena of Italy is an original-equipment supplier to Yamaha, Honda, Kawasaki, Suzuki, and...
Honda CB700SC overhaul gasket set

1984-86 Honda CB700SC Overhaul Gasket Set

$199.95 USD
18-0442
Rebuild your CB700SC Nighthawk engine with this Overhaul Engine Gasket Set.Key Features• Overhaul engine gasket setFitment / Compatibility• All Honda CB700SC (1984‑86) NighthawkPart Number:...
Honda CB700SC CB900F CB1000 cam cover seal 90543-MV9-670

Honda CB700SC / CB900F / CB1000 Cam Cover Seal ~ Replaces 90543-MV9-670

$3.95 USD
01-0158
Keep your late-model Honda's top end leak-free with this Cam Cover Seal, a direct replacement for OEM #90543-MV9-670. Fits the CB700SC Nighthawk plus early...
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1986 Honda CB700SC · Engine Seals & Gaskets Buying guide

Match each seal to its place on the engine

On the 1986 CB700SC, oil at a cover fastener, oil along the cover edge and an exhaust leak at the cylinder head involve different seals. Map the affected joint first. The listed overhaul set has a CB700SC application, but its published description does not itemize the package.

Parts to consider

1984-86 Honda CB700SC Overhaul Gasket Set CB700SC overhaul gasket setEngine overhaul gasket set with an explicit 1984–86 CB700SC application.Voir la pièce Honda CB700SC / CB900F / CB1000 Cam Cover Seal ~ Replaces 90543-MV9-670 Cam-cover mounting sealSold individually. The CB700SC uses eight of these seals per motorcycle.Voir la pièce Honda CB Exhaust Headpipe Gasket (Each) ~ Replaces 18291-MM5-860 Headpipe gasketOne cylinder-head-to-headpipe gasket, replacing reference 18291-MM5-860.Voir la pièce

A mounting seal cannot reseal the whole cover

The selected seal replaces reference 90543-MV9-670 and sits at a cam-cover fastener. Eight are used on the listed CB700SC, with one supplied per purchase. A leak following the cover’s outer edge calls for inspection of the separate perimeter gasket and mating surfaces; buying all eight small seals does not replace that gasket.

Plan for the parts disturbed during the repair

The headpipe gasket seals the exhaust pipe to the cylinder head, with one supplied per purchase. If all four headpipes are being resealed, four individual gaskets are needed. Compare those needs with confirmed overhaul-kit contents to avoid duplicates. For deeper work involving camshaft removal, include Honda’s hydraulic-tappet bleeding procedure in the repair plan.

Buying questions

Can I identify a cover-gasket leak from the name “cam-cover seal”?

The featured cam-cover seal is a fastener mounting seal, not the perimeter gasket. Clean and inspect the area to establish where the oil starts. Replacing a small mounting seal will not address a leak along an unrelated cover edge.

Do hydraulic tappets remove every special requirement from a head rebuild?

No. They remove routine manual valve-clearance adjustment, but Honda specifies bleeding the tappets whenever the camshafts are removed and filling their defoaming chambers during assembly. Follow the CB700SC cylinder-head procedure when planning a deeper repair.

Can I add new headpipe gaskets over the old ones?

Remove the old gasket from each exhaust port before installing its replacement. The gasket deforms in service and the current product guidance calls for replacement when that joint is disturbed. The featured item is sold individually, so four are needed when resealing all four headpipes.

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