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1973 Honda CB125S0 Fuel System

The 1973 CB125S0 fuel range includes carburetor service parts and fuel-tank fittings. These selected choices address a float, a bowl drain screw and the original petcock body seal. Locate the problem and identify any replacement carburetor or tap before ordering.

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Honda motorcycle 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 CB500 CB450 CB125 CB100 float valve 16011-302-004

Honda CB Float Valve ~ Replaces 16011-302-004

$9.95 USD
48-5009
Replace your float needle and seat with this Float Valve Set (needle and seat), replacing OEM #16011-302-004 / #16011-375-004.Key Features• Float valve set (needle...
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...
Honda CB750 CB550 CB500 CB450 CB400 float bowl drain screw

Honda CB Stock Type Float Bowl Drain Screw

$7.50 USD
48-5041
Replace your stock-type float bowl drain screw with this Float Bowl Drain Screw with O-Ring.Note: sold each, order the quantity you require.Key Features• Stock-type...
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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 CB750 CB450 CB350 CB200 CB175 front cable clip 45465-270-000

Honda CB Front Cable Clip ~ Replaces 45465-270-000

$7.00 USD
73-1116
Keep your wiring clean and secure with this Front Cable Clip, designed to hold the stop switch wires neatly against the front cable. Replaces...
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...
New
Honda CB125S premium carb rebuild kit

1973-75 Honda CB125S Premium Carb Rebuild Kit

$31.95 USD
48-1223
Restore proper fuel delivery with this Premium Carburetor Rebuild Kit, designed to refresh worn internal components and bring your carburetor back to reliable operation....
New
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...
Honda CB350 CB125 CB100 CB77 CB72 carb float 16013-286-014

Honda CB Carb Float ~ Replaces 16013-286-014

$22.95 USD
20-6500
Replace your carb float with this Carb Float with Pin, replacing OEM #16013-286-014. Fits the CB350F 1973, CB350K/CL350K/SL350, and the earliest classics including CB72/CB77...
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1973 Honda CB125S0 · Fuel System Buying guide

Trace the repair to the carburetor or tank fitting

A leaking bowl drain, worn float assembly and petcock body seal require different parts. Start with the location and installed equipment, then use the relevant product reference rather than treating every fuel leak alike.

Parts to consider

Honda CB Carb Float ~ Replaces 16013-286-014 Carburetor float with pinFloat with pin, sold individually; reference 16013-286-014. Listed for the 1973–75 CB125S.View part Honda CB Stock Type Float Bowl Drain Screw Float-bowl drain screw with O-ringStock-type float-bowl drain screw supplied with an O-ring. Sold individually.View part 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

Choose the part that matches the carburetor

The float is supplied with its pin and is sold individually. The separate drain screw includes an O-ring and is also sold individually. Compare the fitted carburetor and original components, particularly where the bike has an aftermarket or replacement carburetor.

An original tap seal is a specific choice

The petcock body seal is intended for the stock original tap and sits between the petcock body and tank. Do not assume it also fits an aftermarket replacement tap. Inspect the connection and existing sealing arrangement before selecting the gasket.

Buying questions

Does a float purchase include the pin?

Yes. The float comes with its pin and is sold individually. It replaces reference 16013-286-014 for the 1973–75 CB125S; compare the fitted carburetor before ordering if the motorcycle has been modified.

Do I need to buy the drain-screw O-ring separately?

The selected stock-type float-bowl drain screw is supplied with an O-ring. It is sold individually. Check that the bowl still uses the matching screw arrangement rather than assuming every replacement carburetor is the same.

Will this petcock seal fit a replacement tap?

The seal is specified for the stock original petcock. A replacement tap can have a different body and sealing arrangement, so identify it before choosing the seal instead of relying only on the motorcycle year.

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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