1979 Honda CB650 Exhaust Seals & Studs

Count the exhaust joints and fasteners involved in your 1979 CB650 repair before buying parts. Port gaskets are offered individually or in a ten-pack. The separate headpipe joint seal and eight-stud set serve different needs, so compare the actual exhaust arrangement first.

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Honda CB kick stand stopper rubber 95011-61000

Honda CB Kick Stand Stopper Rubber ~ Replaces 95011-61000

$2.95 USD

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

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 /...

1979-82 Honda CB650 / CB650C Exhaust Stud Set

$34.95 USD

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

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

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 Seals & Studs Buying guide

Identify the gasket location and the fitted flange

The single port gasket, port-gasket ten-pack and separate headpipe joint seal have different buying roles. Choose the seal for the joint being serviced, then check the stud set against the exhaust flange 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

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

Exhaust-port gasket ten-packTen exhaust-port gaskets, supplied as a multi-pack rather than individually.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: Headpipe joint gasket

Keep the two gasket reference families separate

The single port gasket and ten-pack both list 18212-634-000, 18291-236-000 and 18291-MN4-920. The linked joint gasket instead lists 18391-425-000 and 18391-MJ4-000, with the 1979 CB650 explicitly included in that product’s applications.

Order from the stated hardware inventory

Stud set 73-1139 contains eight studs and eight flange nuts. Compare that written inventory with the parts needed for the job and confirm any additional component separately; the package description is not a complete exhaust-repair parts list.

Buying questions

Will the stud set suit an aftermarket exhaust flange?

The stud listing calls for checking the spacing and flange thickness on a non-stock exhaust. It gives no stud thread dimensions or length, so obtain those specifications and compare the fitted flange before ordering where the original arrangement has changed.

Can I confirm the headpipe joint gasket for a replacement exhaust by its Honda application?

The listed application identifies the motorcycle, but the joint-gasket record gives no dimensions for comparison with an aftermarket pipe joint. Identify the exhaust system and obtain its required gasket specification before treating the 18391-425-000 / 18391-MJ4-000 replacement as a 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.

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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