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1968 Honda CB350K0 Tank Caps, Taps & Rubbers

Early tank fittings matter on a CB350K0, particularly when paintwork hides a replacement tank. Compare the filler-cap engagement, petcock connection and mounting rubbers with the tank on the bike before ordering a cap, tap or cushion for the restoration.

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Currently viewing Gas Tanks, Caps, Petcocks & Parts

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Honda CB750 CB550 CB450 CB400 CB350 gas cap rubber seal 17631-329-003

Honda CB Gas Cap Rubber Seal ~ Replaces 17631-329-003

$7.95 USD
20-0097
Replace the broad-fitment gas cap rubber seal on many classic Hondas with this Gas Cap Rubber Seal, replacing OEM #17631-329-003. Exceptionally wide fitment covering...
New
Honda CB550 CB500 CB360 rear fuel tank holder rubber 17613-286-000

Honda CB Rear Fuel Tank Holder Rubber ~ Replaces 17613-286-000

$9.95 USD
12-0133
Restore proper rear fuel tank mounting on your mid-'70s twin or four with this Rear Fuel Tank Holder Rubber, a direct replacement for OEM...
New
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Honda CB1000 CB900 CB750 fuel tank emblem clamp nut 87311-634-600

Honda CB Fuel Tank Emblem Clamp Nut ~ Replaces 87311-634-600

$6.25 USD
99-5267
Secure your fuel tank emblem properly with this Fuel Tank Emblem Clamp Nut, designed as a direct replacement for the original Honda hardware. This...
Honda CB450 CB360 CB350 CL350K0 CL350K2 fuel petcock 16950-292-000

Honda CB Fuel Petcock ~ Replaces 16950-292-000

$34.95 USD
29-0542
Replace your CB450, CL450, CB350, or CB360 fuel petcock with this Fuel Petcock, replacing OEM #16950-292-000 with M16 x 1.5 threads. Please verify the...
New
Honda CB450 CL450 CB350 CB72 gas tank filler cap 17620-402-000

Honda Gas Tank Filler Cap ~ Replaces 17620-402-000

$7.95 USD
07-4647
Restore an early-era Honda with this Chrome Gas Tank Filler Cap (with gasket installed), replacing OEM #17620-402-000 / #17620-402-010. Fits the oldest models in...
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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1968 Honda CB350K0 · Tank Caps, Taps & Rubbers Buying guide

Check the tank fittings before choosing replacements

The chrome cap includes a gasket, the petcock has a specified metric thread and front cushions are sold individually. Match each item to its mounting point rather than treating these as one tank-hardware kit.

Parts to consider

Honda Gas Tank Filler Cap ~ Replaces 17620-402-000 Chrome tank filler capReplacement for 17620-402-000 or 17620-402-010, supplied with its gasket installed.View part Honda CB Fuel Petcock ~ Replaces 16950-292-000 M16 fuel petcockM16 × 1.5 mm tank connection; replacement reference 16950-292-000.View part Front Fuel Tank Rubber Cushion ~ Replaces Honda OEM 17611-KE8-000 Front tank cushionAftermarket replacement for 17611-KE8-000; sold each, order two when replacing both front cushions.View part

Related parts: Separate gas-cap seal · Rear tank holder rubber

Choose a cap or a seal for the job

The complete chrome cap references 17620-402-000 and 17620-402-010, with a gasket already installed. The linked separate seal references 17631-329-003. If retaining the old cap, compare its sealing arrangement first to decide whether a seal-only repair is appropriate.

Count the tank mounting rubbers

The aftermarket front cushion is sold each; order two when replacing both front cushions. The linked rear holder is a different-shaped component referencing 17613-286-000. Inspect the actual mounting points, especially where the tank or frame fittings have been modified.

Common buying questions

Does the chrome filler cap come with a gasket?

Yes. The gasket is installed in the complete replacement cap. If only renewing an existing cap’s seal, compare the separate seal and cap design before choosing that smaller repair.

Can I fit the petcock to any CB350-looking tank?

Check the fitting directly. This tap uses M16 × 1.5 mm threads. A visually similar tank can have a different connection, outlet position or clearance requirement after previous repairs or modifications.

Are the front tank cushions supplied as a pair?

They are sold individually. Order two to renew both front cushions, and inspect the separate rear holder as well when assessing how the tank is supported on the frame.

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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