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1980 Honda CB400TA Hawk Carburetor Components

The 1980 Hawk’s carburetors contain several serviceable systems beyond the float-bowl gasket. Match a leaking drain screw, accelerator-pump diaphragm or air-cut valve to its own location. The two diaphragm types are different parts, so identify the assembly before dismantling it.

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Currently viewing Carb Floats & Other Carb Components

Honda motorcycle parts

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Honda CB1100 CB1000 CB900 CB750 CB650 carb float 16013-413-851

Honda CB Carb Float ~ Replaces 16013-413-851

$27.95 USD
20-6507
Replace your 1980+ DOHC CB carb float with this Carb Float with Pin, replacing OEM #16013-413-851. Broad fitment across the 1980-82 CB750 family, CB750SC...
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 CB900 CB750 CB650 CB450 CB400 air cut off valve 16048-429-771

Honda CB Air Cut Off Valve ~ Replaces 16048-429-771

$26.95 USD
20-4020
Replace your DOHC CB's carb air cut-off valve with this Carb Air Cut-Off Valve, replacing OEM #16048-429-771 (diaphragm) and #16048-425-771 (spring + 1 O-ring).Key...
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 CB900 CB450 CB400 carb pump diaphragm 16021-413-751

1980-82 Honda CB900 / CB450 / CB400 Carb Pump Diaphragm ~ Replaces 16021-413-751

$27.03 USD
20-9041
Rebuild your Keihin carb's accelerator pump with this Carb Pump Diaphragm, replacing OEM #16021-413-751 / #16021-438-671 / #16021-463-004. Kit contains 1 diaphragm with rod,...
Honda CB900 CB750 CB650 air cut off valve with cover 16048-429-771

Honda CB Air Cut Off Valve With Cover ~ Replaces 16048-429-771

$34.95 USD
48-9029
Replace your carb air cut-off valve with this Carb Air Cut-Off Valve with Cover. Replaces OEM #16048-429-771 (diaphragm), #16048-425-771 (spring + 1 O-ring), and...
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1980 Honda CB400TA Hawk · Carburetor Components Buying guide

Match each small carburetor part to its function

A drain screw seals at the float bowl. The accelerator pump and air-cut valve use distinct diaphragms with different shapes and connections. Compare the fitted carburetor and removed part before choosing.

Parts to consider

Honda CB Stock Type Float Bowl Drain Screw Float-bowl drain screwSold individually with its O-ring. Match the screw tip and bowl seat before replacing it.View part 1980-82 Honda CB900 / CB450 / CB400 Carb Pump Diaphragm ~ Replaces 16021-413-751 Accelerator-pump diaphragm kitIncludes one diaphragm with rod, one bellows rubber and O-rings; references 16021-413-751.View part Honda CB Air Cut Off Valve ~ Replaces 16048-429-771 Air-cut valve componentsDiaphragm, spring and small seal for the carburetor air-cut valve; the diaphragm references 16048-429-771.View part

Service the drain screw with its own seal

The featured drain screw is sold individually with an O-ring. Compare the tip and sealing area with the existing bowl, and inspect the bowl seat before fitting another screw. Two carburetors do not mean a single drain-screw purchase supplies a pair.

Keep the two diaphragms distinct

The accelerator-pump kit includes one diaphragm with its rod, one bellows rubber and O-rings. The air-cut components serve a different carburetor circuit. Match the removed assembly and keep its hardware identified; neither diaphragm should be ordered as a substitute for the other.

Buying questions

How many drain screws come with one purchase?

One drain screw is supplied with its O-ring. Order the number of bowl drains being renewed; the number of carburetors on the motorcycle is not the package quantity.

What is included with the accelerator-pump diaphragm?

The specified contents are one diaphragm with rod, one bellows rubber and O-rings. Match the fitted pump assembly and inspect its remaining hardware before deciding what else the repair needs.

Is an air-cut diaphragm interchangeable with the pump diaphragm?

No. They work in different carburetor assemblies and have different shapes and connections. Identify whether you are servicing the air-cut valve or accelerator pump before selecting the replacement.

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