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1981 Honda CB400TB Carburetor Repair Parts

A leaking float bowl and a worn inlet needle need different service parts. These 1981 CB400TB choices let you address either area without assuming a broad rebuild assortment contains the correct calibration parts. Identify the fitted carburetors before completing the repair order.

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Currently viewing Carb Rebuild & Jetting

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Honda CB1100 CB1000 CB900 CB750 float bowl gasket

Honda CB1100/CB1000/CB900/CB750 Float Bowl Gasket

$9.50 USD
20-8031
Replace your DOHC CB float bowl gasket with this Float Bowl Gasket (O-ring). Broad fitment across the 1979-82 CB750 family, CB750SC Nighthawk, CB900/CB1000/CB1100, CB650...
Honda CB1100 CB1000 CB900 CB750 CB700 carb float needle 16155-413-751

Honda CB Carb Float Needle ~ Replaces 16155-413-751

$8.95 USD
48-5011
Replace your DOHC CB float needle (only) with this Float Needle, replacing OEM #16155-413-751.Key Features• Float needle (only)• Replaces OEM #16155-413-751• Honda part name:...
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Honda CB400 premium carb rebuild kit

1978-81 Honda CB400 Premium Carb Rebuild Kit

$34.95 USD
48-1226
Restore proper fuel delivery and carburetor performance with this Premium Carburetor Rebuild Kit, designed for Honda twin-cylinder carburetors. This kit features long-lasting, high-quality Viton...
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1981 Honda CB400TB · Carburetor Seals & Needles Buying guide

Separate fuel sealing from changes to jetting

The bowl gasket seals the bowl joint, while the float needle controls fuel entry with the float. Inspect each area and preserve the correct carburetor specification instead of replacing jets simply because they appear in a kit.

Parts to consider

Honda CB1100/CB1000/CB900/CB750 Float Bowl Gasket Float-bowl gasketFormed bowl-sealing O-ring with an explicit CB400T 1980–81 application.View part Honda CB Carb Float Needle ~ Replaces 16155-413-751 Float needleNeedle only, replacing reference 16155-413-751. Assess the float and seating surface separately.View part

Order sealing parts for the fault found

Fuel at the bowl joint calls for inspection of the gasket and mating surfaces. Overflow or poor shutoff requires assessment of the float, needle and seating area. Identify the source before buying so that one new seal is not expected to correct another part’s fault.

Treat jet selection as its own decision

Jet sizes in a multi-application kit are not automatically the correct settings for the 1981 Hawk. Match the fitted carburetor identification and the applicable Honda specification, accounting for previous changes. Keep service replacements separate from any intentional recalibration of the engine.

Buying questions

Does the float needle include a new seat?

The featured product is the float needle only. Inspect the seating surface and float mechanism before ordering; a replacement needle cannot by itself correct every cause of poor fuel shutoff.

Will a bowl gasket stop fuel coming from an overflow?

Not necessarily. The gasket seals the bowl joint, while fuel level and shutoff involve the float and needle. Locate the leak and assess those components before choosing the replacement.

Should I install every jet supplied in a rebuild kit?

No. Confirm the actual carburetor and its specified calibration first. A kit may include alternatives for several applications, and changed intake or exhaust equipment needs its own assessment rather than an assumed stock setting.

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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