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1982 Honda CB900C Custom Exhaust Gaskets

For a leaking or dismantled exhaust-port joint on the 1982 CB900C Custom, start with the gasket’s location and the number of joints being opened. The headpipe gasket here is supplied individually, so a repair involving several pipes needs a deliberately counted order.

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Honda CB1100 CB1000 CB900 exhaust headpipe gasket (each) 18291-254-000

Honda CB Exhaust Headpipe Gasket (Each) ~ Replaces 18291-254-000

$3.42 USD
17-2812
Replace one exhaust port gasket on your CB750 or big-bore DOHC CB with this Exhaust Port Gasket, 1 piece, replacing OEM #18291-254-000 / #18291-MM5-860....
Honda CB kick stand stopper rubber 95011-61000

Honda CB Kick Stand Stopper Rubber ~ Replaces 95011-61000

$2.95 USD
07-4624
Replace a worn kick stand stopper with this Kick Stand Stopper Rubber "A", a direct replacement for OEM #95011-61000. Exceptionally broad fitment across the...
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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 CB900C CB900F CB750K exhaust stud and flange nut set

1979-82 Honda CB900C / CB900F / CB750K Exhaust Stud & Flange Nut Set

$34.95 USD
73-1140
Restore your classic Honda’s exhaust system with this premium Exhaust Stud Set, engineered for durability and a precise fit. This 8-piece kit includes eight...
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1982 Honda CB900C Custom · Exhaust Gaskets Buying guide

Count the port joints before ordering individual gaskets

The featured sealing piece fits the cylinder-head-to-headpipe joint and references 18291-MM5-860. Choose it for that location rather than using an exhaust-category label to identify every gasket in a modified system.

Parts to consider

Honda CB Exhaust Headpipe Gasket (Each) ~ Replaces 18291-MM5-860 Cylinder-head-to-headpipe gasketSold individually; replacement reference 18291-MM5-860 for the listed Custom application.View part

Identify the sealing location

The featured gasket is sold individually for the headpipe-to-cylinder-head port. Four are needed when all four ports are resealed. Remove each old crush gasket from a disturbed port before fitting its replacement, and inspect the seating surface rather than stacking a new gasket over the old one.

Keep the order quantity explicit

One purchased gasket supplies one sealing piece. Count the joints being disturbed, and inspect their seating surfaces and fastening hardware before reassembly. Use the service manual for the installation sequence and specifications rather than assuming a new gasket alone resolves damaged mounting parts.

Exhaust Gaskets questions

Can an old port gasket be left beneath the new one?

No. Remove the old crush seal from the disturbed port and inspect the seat before fitting a fresh gasket. A compressed old ring can be easy to overlook; stacking seals is not a substitute for preparing the joint properly.

Are the exhaust joint collars the same parts as the gaskets?

No. The 18233-425-000 product is one joint half-collar, with two used at each cylinder-head pipe joint. The gasket seals inside the port. Match the missing or damaged piece before ordering either product, and inspect the studs, nuts and flanges separately.

Does replacing an exhaust gasket mean all studs must be renewed?

Inspect the studs, nuts, cylinder-head threads and retained pipe flanges first. The gasket serves a separate sealing job; damaged fasteners or threads need their own repair, but opening a joint alone does not prove that every stud must be replaced.

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