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1978 Honda CB125S5 Fuel System Parts

Plan a 1978 Honda CB125S5 fuel-system order around the particular carburetor component being serviced. The featured float needle and bowl drain screw are separate purchases with different contents, so identify the needed part before assembling a broader carburetor-service order.

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Honda motorcycle parts

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Honda CB750 CB650 CB125 press in pilot jet set size #40 (pk 4)

Honda CB750 / CB650 / CB125 Press In Pilot Jet Set ~ Size #40 (Pk/4)

$24.64 USD
48-9034
#40 pilot jet set for applications that use press-in style jets. These control fuel flow at idle and low throttle, making them important for...
Sold out
Honda CB750 CB650 CB550 CB400 CB125 float needle 16011-382-004

Honda CB Float Needle ~ Replaces 16011-382-004

$8.95 USD
48-5010
Replace your float needle (only) with this Float Needle, replacing OEM #16011-382-004.Key Features• Float needle (only)• Replaces OEM #16011-382-004• Honda part name: Valve Set,...
Honda CB1100 CB1000 CB900 CB750 float bowl drain screw -a

Honda CB Stock Type Float Bowl Drain Screw ~-A

$6.50 USD
48-5042
Small part, but an important one. This float bowl drain screw with included O-ring allows you to properly drain the carburetor bowl without leaks,...
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Sold out
Honda CB750 CB650 CB125 press in pilot jet set size #38 (pk 4)

Honda CB750 / CB650 / CB125 Press In Pilot Jet Set ~ Size #38 (Pk/4)

$24.64 USD
48-9033
Press In Pilot Jet Set/4 ~ #38 Size Please Double Check you Require the #38 Size Before Ordering Fits: Honda CB750K (1977-78), CB750F (1977-78)...
New
Honda CB750 CB650 CB125 press in pilot jet set size #42 (pk 4)

Honda CB750 / CB650 / CB125 Press In Pilot Jet Set ~ Size #42 (Pk/4)

$24.64 USD
48-9035
Pilot jet set sized at #42, designed for applications that use press-in style jets. A key component in fuel delivery at idle and low...
New
Honda CB750 CB650 CB125 press in pilot jet set size #35 (pk 4)

Honda CB750 / CB650 / CB125 Press In Pilot Jet Set ~ Size #35 (Pk/4)

$24.64 USD
48-9028
Replace your press-in pilot jets with this Press In Pilot Jet Set of 4, size #35. Please double-check that you require the stock #35...
Honda CB1100 CB1000 CB900 CB750 float bowl drain screw

Honda CB Stock Type Float Bowl Drain Screw

$6.50 USD
48-5042
Replace your stock-type float bowl drain screw with this Float Bowl Drain Screw with O-Ring for the later DOHC and Nighthawk lineup.Note: sold each,...
Honda CB400F CB125S fuel petcock 16950-GF6-015

1975-81 Honda CB400F / CB125S Fuel Petcock ~ Replaces 16950-GF6-015

$13.51 USD
12-0078
Fit a petcock to our CB400F aftermarket gas tank or replace the stock one on your CB125S with this Fuel Petcock. An M14 x...
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1978 Honda CB125S5 · Fuel System Buying guide

Separate the needle purchase from the bowl-drain repair

The float needle replaces reference 16011-382-004 and is supplied as the needle only. The bowl drain screw is sold individually with an O-ring. Both replacements cover the 1978 CB125S application.

Parts to consider

Honda CB Float Needle ~ Replaces 16011-382-004 Replacement float needleFloat needle only, replacing reference 16011-382-004. The application includes the 1978 CB125S.View part Honda CB Stock Type Float Bowl Drain Screw ~-A Float bowl drain screw with O-ringStock-type drain screw with its O-ring included. Sold individually for the listed 1978–79 CB125S application.View part

Build the order around individual components

The float needle is a needle-only replacement. If your work also requires a seat or other carburetor parts, identify those separately before ordering. The drain screw is another distinct purchase, supplied individually with its O-ring rather than as part of the needle purchase.

Keep changed carburetors in view

Both featured components have explicit 1978 CB125S applications, but a replacement carburetor should be identified on its own terms. Compare the installed carburetor and removed part before ordering. Use the correct carburetor service information for adjustments and installation requirements.

Common ordering questions

Does the float needle purchase include a matching seat?

No. The confirmed scope is the float needle only, replacing reference 16011-382-004. If the seat also needs attention, identify the correct component separately before treating this as a complete valve replacement.

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

The featured stock-type drain screw includes its O-ring and is sold individually. Check your service order for duplicate seals, and base the number of screws ordered on the installed parts you intend to replace.

What should I do if the carburetor has been replaced?

Identify that carburetor before choosing either part. The documented application covers the 1978 CB125S, but it does not identify every replacement carburetor that may have been fitted during the motorcycle’s life.

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Send your model and year, plus photos of your existing part and any changes to the original setup.

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