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1981 Honda CB400TB Fuel-Tank Service Parts

Tank leaks and loose mounting points call for different repairs on the 1981 Hawk. The cap seal, threaded petcock and front rubber cushion each address a specific location. Inspect the actual tank and cap first, particularly where a previous owner has changed either part.

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Currently viewing Gas Tanks, Caps, Petcocks & Parts

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Honda CB1100 CB900 CB750 CB450 gas cap rubber seal 17632-176-771

1981-83 Honda CB1100 / CB900 / CB750 / CB450 Gas Cap Rubber Seal ~ Replaces 17632-176-771

$8.95 USD
73-0919
Replace your gas cap rubber seal with this Gas Cap Rubber Seal, replacing OEM #17632-176-771.Key Features• Gas cap rubber seal• Replaces OEM #17632-176-771Fitment /...
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Honda CB400 fuel petcock 16951-385-703

1978-81 Honda CB400 Fuel Petcock ~ Replaces 16951-385-703

$15.82 USD
29-0543
Keep fuel flowing reliably to your carburetors with this Fuel Petcock, designed as a direct replacement for several original Honda fuel valve assemblies. This...
Honda CB front fuel tank rubber cushion 17611-KE8-000

Front Fuel Tank Rubber Cushion ~ Replaces Honda OEM 17611-KE8-000

$5.50 USD
27-5520
This aftermarket front fuel tank rubber cushion replaces Honda OEM 17611-KE8-000 on the listed Honda CB-series applications. It mounts to the frame and supports...
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1981 Honda CB400TB · Tank Seals & Fuel Valve Buying guide

Check the cap, fuel outlet and mounting rubbers

The cap seal is selected for the 1981 application, the petcock uses an M16 × 1.5 connection, and the front cushion is sold each. Match those three interfaces independently when planning a tank-service order.

Parts to consider

1981-83 Honda CB1100 / CB900 / CB750 / CB450 Gas Cap Rubber Seal ~ Replaces 17632-176-771 Fuel-cap rubber sealSeparate seal for the 1981 CB400T cap, replacing reference 17632-176-771.View part 1978-81 Honda CB400 Fuel Petcock ~ Replaces 16951-385-703 Fuel petcockCB400T replacement fuel valve with an M16 × 1.5 tank connection.View part Front Fuel Tank Rubber Cushion ~ Replaces Honda OEM 17611-KE8-000 Front tank cushionAftermarket front mounting rubber, sold each. Order two when replacing both front cushions.View part

Identify a changed tank before choosing its valve

The petcock is listed for the CB400T, but a different tank can bring a different thread and outlet position. Compare the actual fitting and fuel-hose clearance before ordering. Inspect the tank connection itself so that a replacement valve is not expected to repair damaged tank threads.

Keep sealing and support repairs separate

The cap seal serves the cap joint; the front cushions locate and support the tank at the frame. Check for hardened or flattened rubbers when the tank is removed. Each cushion is an individual purchase, with two needed when replacing both front mounting positions.

Buying questions

Will this petcock fit an aftermarket tank?

Only if the tank connection matches M16 × 1.5 and the valve has suitable outlet clearance. Compare the actual tank fitting before ordering; the original motorcycle application cannot establish the thread of a replacement tank.

Do I receive a pair of front tank cushions?

No. The featured aftermarket cushion is sold individually. Order two when replacing both front cushions, and compare the rubber shape if the tank mounting arrangement has been modified.

Can the rubber cap seal be replaced without buying another cap?

The seal is offered separately for the listed 1981 cap application. Inspect the fitted cap and its sealing surface first; a replacement rubber cannot repair damaged cap hardware or an incorrect cap-to-tank fit.

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