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1979 Honda CB650 Exhaust Gaskets & Hardware

Exhaust service parts for the 1979 CB650 cover sealing and mounting repairs. Identify the leaking joint or damaged hardware before ordering. Port gaskets, a headpipe joint gasket and a stud-and-nut set address different locations in the exhaust assembly.

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Honda motorcycle parts

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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...
Honda CB900 CB650 CB550 exhaust headpipe gasket (each) 18212-634-000

Honda CB Exhaust Headpipe Gasket (Each) ~ Replaces 18212-634-000

$3.58 USD
17-2813
Replace one exhaust port gasket on your CB650, CB400, CB450, or modern CB900F with this Exhaust Port Gasket, 1 piece, replacing OEM #18212-634-000 /...
Honda CB650 CB650C exhaust stud set

1979-82 Honda CB650 / CB650C Exhaust Stud Set

$34.95 USD
73-1139
Restore your exhaust system’s performance and reliability with this complete Exhaust Stud Set for your Honda CB650 or CB650C. Designed to meet OEM specs,...
Honda CB900 CB650 CB550 exhaust headpipe gaskets (pk 10) 18212-634-000

Honda CB Exhaust Headpipe Gaskets ~ (Pk/10) ~ Replaces 18212-634-000

$27.95 USD
17-3813
Stock up on exhaust port gaskets for your CB650, CB400, CB450, or modern CB900F with this 10-pack, replacing OEM #18212-634-000 / #18291-236-000 / #18291-MN4-920.Key...
Honda CB750K CB750L CB650 exhaust joint gasket for headpipe 18391-425-000

1979-82 Honda CB750K / CB750L / CB650 Exhaust Joint Gasket for Headpipe ~ Replaces 18391-425-000

$9.95 USD
17-4506
Replace your DOHC CB750 or 1979 CB650 exhaust joint gasket with this Exhaust Joint Gasket for Headpipe, replacing OEM #18391-425-000 / #18391-MJ4-000.Key Features• Exhaust...
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1979 Honda CB650 · Exhaust Gaskets & Hardware Buying guide

Plan exhaust sealing and mounting as separate purchases

This selection covers port seals, a separate headpipe joint gasket and a stud-and-nut set. Identify which joint or fastener needs attention, then check that individual product’s application against the exhaust actually fitted.

Parts to consider

Honda CB Exhaust Headpipe Gasket (Each) ~ Replaces 18212-634-000 Individual exhaust-port gasketOne exhaust-port gasket; references 18212-634-000, 18291-236-000 and 18291-MN4-920.View part 1979-82 Honda CB750K / CB750L / CB650 Exhaust Joint Gasket for Headpipe ~ Replaces 18391-425-000 Headpipe joint gasketSeparate exhaust-joint gasket for the 1979 CB650; references 18391-425-000 and 18391-MJ4-000.View part 1979-82 Honda CB650 / CB650C Exhaust Stud Set Exhaust stud and nut setEight exhaust studs and eight flange nuts for the CB650 application.View part

Related parts: Exhaust-port gasket ten-pack

Choose the port-gasket package after checking its reference

The single-piece gasket and ten-pack share references 18212-634-000, 18291-236-000 and 18291-MN4-920. They supply one and ten port gaskets respectively. The headpipe joint gasket is a separate item with references 18391-425-000 and 18391-MJ4-000.

Keep the hardware inventory separate from the seals

Set 73-1139 supplies eight exhaust studs and eight flange nuts. Compare that inventory with the repair parts needed and confirm any other components separately rather than treating the hardware set as an all-in-one exhaust-service package.

Buying questions

Does the broad year range on the joint-gasket title apply to every listed Honda model?

Check the detailed application list. Within the CB650 family, joint gasket 17-4506 explicitly lists the 1979 CB650. The port-gasket listings cover additional CB650 years and variants, but their wider coverage does not extend the joint gasket’s stated application.

How can I choose a joint gasket when the exhaust has no Honda reference?

Identify the exhaust system and obtain its required gasket specification first. The joint-gasket listing provides replacement Honda references but no dimensions for checking an unidentified pipe joint, so the motorcycle’s model alone does not establish that match.

Can I reuse a port gasket after removing the headpipe?

Honda’s Common Service Manual calls for a new exhaust-pipe gasket whenever the pipe is removed from the engine. Include a replacement for each opened port connection and use the model-specific manual for assembly and tightening.

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