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1979 Honda CB125S Carburetor Bowl Drain Screw

A damaged bowl drain screw is a focused carburetor repair on the 1979 Honda CB125S. Compare the screw fitted now with the replacement below and inspect the bowl connection. This sold-each product includes an O-ring for the screw.

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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,...
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,...
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1979 Honda CB125S · Carburetor Bowl Drain Screw Buying guide

Inspect the bowl connection with the old drain screw

The included O-ring makes the package different from a bare screw. Match the fitting to the retained bowl and check its receiving thread before deciding whether replacement of the screw is sufficient.

Parts to consider

Honda CB Stock Type Float Bowl Drain Screw ~-A Bowl drain screw with O-ringIndividually supplied drain screw with its O-ring included.View part

Look beyond the damaged screw head

Inspect the old screw, receiving thread and sealing area together. A damaged bowl connection needs separate assessment; a new screw and O-ring cannot establish that the surrounding bowl is serviceable. Identify that issue before completing a screw-only repair order.

Match a replacement bowl on its own terms

The application includes the 1979 CB125S, but a changed bowl or carburetor may need a different drain fitting. Keep the removed screw and assembly identity available for comparison. Do not infer thread size or tightening specifications from the motorcycle application.

Buying questions

Is the O-ring a separate purchase for this screw?

The pictured screw includes its O-ring and is sold individually. That confirms the package contents; inspect the retained bowl and its connection to determine whether the job needs another component as well.

What if the old screw will not seal despite an intact O-ring?

Have the screw and bowl sealing area assessed together before ordering. Damage or alteration to the receiving connection may need attention beyond this replacement. Avoid treating a new screw as a confirmed cure without that inspection.

Can I order it by thread size?

The available description does not provide a thread diameter or pitch. Use the supported application and compare the actual fitting; obtain the required measurements before choosing it for a changed bowl or unidentified carburetor.

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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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