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1970 Honda CB350K2 Tank Caps & Petcocks

The 1970 CB350K2 cap application is worth checking carefully: the available chrome cap and separate seal specifically include this year. Match that cap style, measure the petcock thread and inspect the tank’s front and rear rubber supports before ordering.

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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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1970 Honda CB350K2 · Tank Caps, Petcocks & Mounts Buying guide

Match the early cap and the tank’s actual connections

A replacement tank can change several fitment decisions at once. Compare its filler opening, petcock connection and rubber mounting points with the original arrangement before selecting components from this K2 tank-parts range.

Parts to consider

Honda Gas Tank Filler Cap ~ Replaces 17620-402-000 Chrome fuel tank capChrome filler cap with its gasket already installed; the application specifically includes the 1970 CB350K.View part Honda CB Fuel Petcock ~ Replaces 16950-292-000 M16 × 1.5 fuel petcockReplacement petcock with M16 × 1.5 mm tank threads, listed against reference 16950-292-000.View part Front Fuel Tank Rubber Cushion ~ Replaces Honda OEM 17611-KE8-000 Front tank rubber cushionAftermarket cushion replacing 17611-KE8-000, sold individually; order two when renewing both front supports.View part

Related parts: Fuel cap rubber seal · Rear fuel tank rubber

Choose a cap or a seal by condition

The chrome filler cap comes with its gasket installed. The linked rubber seal is available separately when the existing cap is retained. Both products specifically name the 1970 CB350K, so check a changed tank or cap rather than carrying the fitment into later designs.

Inspect the mounting rubbers while the tank is off

The aftermarket front cushions are sold individually; order two when replacing both front supports. The rear holder rubber is a separate linked part. Compare their shapes and mounting points, especially if the tank has been swapped or modified.

Common buying questions

Do I need a separate seal with the chrome cap?

The chrome cap includes its gasket already installed. The separate seal is useful when keeping a compatible existing cap, so base the order on which component you are replacing.

Will the petcock fit any tank on a CB350K2?

No. Verify the tank’s M16 × 1.5 mm connection, outlet arrangement and available clearance. An aftermarket or replacement tank may have fittings that differ from the original motorcycle’s.

How many front tank cushions should I order?

They are sold individually. Order two when renewing both front support positions, and inspect the separate rear holder rubber before completing the tank-mounting parts order.

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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