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1981 Honda CB650C Custom Exhaust Gaskets & Hardware

Keep gasket quantities separate from the stud-and-nut package when ordering exhaust parts for the 1981 CB650C. The sealing products are offered individually or in a ten-pack. Inspect the header fittings and fasteners before deciding whether the repair also needs new mounting hardware.

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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...
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1981 Honda CB650C Custom · Exhaust Gaskets & Hardware Buying guide

Match the sealing reference and the fitted exhaust flange

The port-gasket options share replacement references but differ in package quantity. The stud-and-nut set is a separate purchase; compare its stated inventory and the fitted flange before treating it as the hardware for a changed exhaust.

Parts to consider

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 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

Use the same reference check for either gasket package

Gasket 17-2813 supplies one piece and pack 17-3813 supplies ten. Both list 18212-634-000, 18291-236-000 and 18291-MN4-920 for exhaust-port sealing. Keep those references with the order rather than choosing a gasket only because its title mentions the exhaust.

Read the stud set as a hardware inventory

Set 73-1139 supplies eight exhaust studs and eight flange nuts. Compare that written inventory with the parts required and confirm additional components separately; it is not a complete exhaust-repair parts list.

Exhaust Gaskets & Hardware questions

Will the stud set suit an aftermarket exhaust flange?

The stud listing calls for checking 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 the port-gasket reference confirm a seal for a different pipe joint?

These listings identify exhaust-port gaskets and give replacement references, but no dimensions for comparing an unidentified joint. Obtain the fitted exhaust system’s required gasket specification before selecting a seal for a different location or a changed connection.

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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