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1981 Honda CB650 Exhaust Service Parts

Inspect the exhaust-port joints and fasteners before ordering service parts for your 1981 Honda CB650. Gaskets are offered individually or in a ten-pack, while the stud set includes eight studs and eight flange nuts. Match the repair scope to those contents.

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Currently viewing Exhaust

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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1981 Honda CB650 · Exhaust Service Parts Buying guide

Prepare the headpipe joints and fasteners

The selected parts cover exhaust-port sealing and retention hardware. Count the joints being opened and assess the studs before choosing gasket quantities and deciding whether the hardware set is needed.

Parts to consider

Honda CB Exhaust Headpipe Gasket (Each) ~ Replaces 18212-634-000 Individual exhaust-port gasketOne gasket per purchase, with listed CB650 application.View part Honda CB Exhaust Headpipe Gaskets ~ (Pk/10) ~ Replaces 18212-634-000 Ten exhaust-port gasketsTen-pack of gaskets sharing the listed replacement references.View part 1979-82 Honda CB650 / CB650C Exhaust Stud Set Exhaust studs and flange nutsEight studs and eight flange nuts for the listed CB650 application.View part

Choose a sensible gasket quantity

The individual listing supplies one exhaust-port gasket, and the bulk option contains ten. Count the joints included in the repair and any intended spares rather than assuming a ten-pack is the motorcycle’s fitted quantity. Keep the matching references with the order.

Inspect the retention hardware

The stud set supplies eight studs and eight flange nuts. Assess damaged fasteners and the surrounding cylinder-head threads before choosing replacement hardware. Follow the correct service information for removal and tightening, especially where corrosion or previous repairs complicate the job.

Ordering 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.

Will the port gaskets fit every aftermarket exhaust?

Confirm the aftermarket system’s port connection and requirements. The listed motorcycle application does not establish every modified exhaust joint, so compare the actual parts before ordering.

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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