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1973 Honda CB125S0 Tank & Petcock Parts

Identify the tap on your 1973 CB125S0 before replacing its tank-to-petcock body seal. The featured gasket is for the stock original petcock. A replacement tap or changed tank can use a different connection, even when the motorcycle model matches.

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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 CB750 CB550 CB500 CB350 CB200 fuel petcock gasket 16997-273-006

Honda CB Fuel Petcock Body O-Ring / Gasket ~ Replaces 16997-273-006

$5.50 USD
49-0260
Replace your fuel petcock gasket with this Fuel Petcock Gasket / O-Ring, replacing OEM #16997-273-006 / #16960-011-000. This is the O-ring that goes between...
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...
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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...
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...
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Honda CB125S CB100K fuel petcock 16950-107-000

1970-74 Honda CB125S / CB100K Fuel Petcock ~ Replaces 16950-107-000

$21.46 USD
29-0541
Replace your CB100K or CB125S fuel petcock with this Fuel Petcock, replacing OEM #16950-107-000 / #16950-107-005 / #16950-356-005 / #16950-356-700. Single fuel output type...
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1973 Honda CB125S0 · Tank & Petcock Parts Buying guide

Check the original petcock before selecting its body seal

This seal sits between the petcock body and the tank. Establish which tap and sealing arrangement are installed before ordering, rather than assuming a visually similar replacement tap uses the same gasket.

Parts to consider

Honda CB Fuel Petcock Body O-Ring / Gasket ~ Replaces 16997-273-006 Original-petcock body sealSeal between the petcock body and tank, referencing 16997-273-006 / 16960-011-000. For the stock original petcock.View part

Identify the sealing joint

The featured gasket seals the petcock body against the tank. Confirm that this is the joint needing attention before buying it. A leak from another part of the tap requires its own diagnosis and correctly identified service part.

Replacement taps can change the choice

A bike restored with another tank or tap may no longer use the original sealing arrangement. Compare the installed parts and their references. The gasket application expressly calls for the stock original petcock, so an aftermarket tap needs its own compatibility check.

Buying questions

How do I tell whether I need the tank-to-petcock body seal?

Identify the joint needing repair before ordering. This gasket seals between the stock original petcock body and the fuel tank; a leak from another part of the tap needs the appropriate service part for that location.

Will it fit an aftermarket stock-style petcock?

That application is not established. The product specifically calls for a stock original petcock. Check the replacement tap manufacturer’s sealing requirements before ordering a gasket for an aftermarket unit.

Should I buy a seal when replacing the complete tap?

First check the replacement tap’s supplied parts and connection requirements. This gasket is for the supported original petcock, and its availability does not establish which seal a different complete tap needs.

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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