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1981 Honda CB650 Tank Caps & Petcocks

Tank changes are common enough that your 1981 Honda CB650 frame year should be the starting point, not the only check. Compare the petcock thread, cap fitting and front cushion shape with the tank currently on the motorcycle.

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Most orders ship same or next business day Fitment guarantee Listed for your exact model and year? We’ll make it right if it doesn’t fit as described. Mechanic-backed support Ask our team for help choosing the right Honda CB part.
Currently viewing Gas Tanks, Caps, Petcocks & Parts

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Honda CB900 CB750 CB650 fuel petcock 16950-MA4-671

1981 Honda CB900 / CB750 / CB650 Fuel Petcock ~ Replaces 16950-MA4-671

$44.95 USD
20-8041
Replace your 1981 DOHC CB's fuel petcock with this Fuel Petcock, replacing OEM #16950-MA4-671 / #16950-461-771 with M18 x 1.0 threads. Please verify the...
Honda CB750C CB750SC CB900C CB1000C gas fuel tank cap 17620-460-067

Honda CB Gas / Fuel Tank Filler Cap ~ Replaces 17620-460-067

$44.95 USD
65-6508
Replace your gas tank cap with this OEM Type Gas/Fuel Tank Cap with gasket and 2 keys, replacing OEM #17620-460-067.Key Features• OEM-type gas /...
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 CB650 · Tank Caps & Petcocks Buying guide

Identify the offered valve and the cap package

The valve’s listed connection and references identify the replacement being offered. The locking cap supplies its own gasket and keys, while the front cushion is chosen separately by its mount shape and reference.

Parts to consider

1981 Honda CB900 / CB750 / CB650 Fuel Petcock ~ Replaces 16950-MA4-671 M18 fuel petcockM18 × 1.0 thread; listed specifically for the 1981 CB650 application.View part Honda CB Gas / Fuel Tank Filler Cap ~ Replaces 17620-460-067 Locking tank capOEM-type replacement supplied with a gasket and two keys.View part Front Fuel Tank Rubber Cushion ~ Replaces Honda OEM 17611-KE8-000 Front tank cushionAftermarket cushion for reference 17611-KE8-000, sold individually.View part

Check the M18 valve’s product identity

Petcock 20-8041 lists replacement references 16950-MA4-671 and 16950-461-771. One valve is supplied with the specified M18 × 1.0 tank connection.

Separate included cap parts from other hardware

Cap 65-6508 replaces reference 17620-460-067 and comes with a gasket and two keys. Confirm any additional mounting hardware needed for the repair; the written package list does not establish that inventory.

Ordering questions

Does the 1981 application settle the fit after a tank change?

No. Compare the fitted tank with the offered M18 × 1.0 connection, then check the sealing arrangement, outlet direction, hose size and lever clearance. Those additional comparisons are specified in the valve’s buying guidance.

Will I still be able to use my ignition key for the fuel cap?

The replacement cap is supplied with two keys, but its listing does not promise matching to an existing ignition key or offer a matching-key option. Confirm that requirement before ordering if using one key for both locks is important.

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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