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1980 Honda CB650C Custom Exhaust Gaskets & Studs

The exhaust service selection for the 1980 Honda CB650C Custom focuses on port gaskets and mounting studs. Decide how many sealing points you are renewing, then check the stud and flange-nut condition so the order matches the work planned.

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Honda motorcycle parts

Choose your model and year to see parts listed for your bike.

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...
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1980 Honda CB650C Custom · Exhaust Service Parts Buying guide

Plan the sealing parts and mounting hardware together

Individual exhaust gaskets suit a small repair order, while the ten-pack supplies workshop stock. The stud set contains eight studs and eight flange nuts, making its contents a separate choice from the gasket quantity.

Parts to consider

Honda CB Exhaust Headpipe Gasket (Each) ~ Replaces 18212-634-000 Individual exhaust port gasketOne gasket replacing references 18212-634-000, 18291-236-000 and 18291-MN4-920.View part Honda CB Exhaust Headpipe Gaskets ~ (Pk/10) ~ Replaces 18212-634-000 Ten-pack exhaust port gasketsTen exhaust port gaskets with the same replacement references as the individual gasket.View part 1979-82 Honda CB650 / CB650C Exhaust Stud Set Exhaust stud and flange-nut setEight exhaust studs and eight flange nuts, listed for the 1980–81 CB650C Custom.View part

Choose gasket packaging for the job

The individual gasket and ten-pack share replacement references 18212-634-000, 18291-236-000 and 18291-MN4-920. Choose the package that matches your planned seal replacements and spare-stock needs. The ten-pack is a quantity option, rather than a different exhaust application.

Assess the fastening parts before assembly

The CB650C stud set contains eight studs and eight flange nuts. Inspect the existing mounting hardware before starting exhaust work, and refer to the correct manual for the service procedure and tightening requirements. Keep gasket selection separate from the hardware set.

Buying questions

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.

Will a new stud set fix damaged cylinder-head threads?

No. Inspect the head threads before installing replacement studs. The stud supplier calls for proper extraction methods for seized hardware rather than forcing it in the aluminum head, followed by the specified installation depth and even flange-nut tightening. Resolve damaged threads before relying on new hardware.

Can I choose these for an aftermarket exhaust?

Check the connection at the cylinder head and the exhaust manufacturer’s requirements first. The listed CB650C application helps identify the original connection, but it does not establish every modified header or flange arrangement.

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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