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1977 Honda CB750K Carb Floats & Components

The 1977 Honda CB750K small carb parts include floats with pins, accelerator-pump diaphragms, drain screw seals and hardware for the carburetor bank. Choose the component that matches the fault and compare package quantities: a four-pack of seals is different from a single replacement screw.

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Currently viewing Carb Floats & Other Carb Components

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Honda CB750 CB650 CB450 carb pump diaphragm 16021-393-004

Honda CB750 / CB650 / CB450 Carb Pump Diaphragm ~ Replaces 16021-393-004

$27.95 USD
20-9040
Rebuild your Keihin carb's accelerator pump with this Carb Pump Diaphragm, replacing OEM #16021-393-004 / #16021-393-014 / #16021-MC9-771. Kit contains 1 diaphragm with rod...
Honda CB1100 CB1000 CB900 CB750 float bowl drain screw o-rings pk 4

Honda CB Float Bowl Drain Screw O-Rings Pk/4

$5.80 USD
48-0792
Replace your float bowl drain screw O-rings with this Float Bowl Drain Screw O-Rings 4-Pack.Key Features• Float bowl drain screw O-rings• 4 per packFitment...
Honda CB1100 CB1000 CB900 CB750 CB550 air screw needle o-ring

Honda CB Air Screw Needle O-Ring

$1.95 USD
48-5043
Replace your air screw needle O-ring with this Air Screw Needle O-Ring, 2.8mm x 1.2mm.Note: sold each, order the quantity you require.Key Features• Air...
Honda CB750F CB750K carb overflow guide 11355-300-000

1971-78 Honda CB750F / CB750K Carb Overflow Guide ~ Replaces 11355-300-000

$7.50 USD
73-0951
Replace your carb overflow guide with this Carb Overflow Guide, replacing OEM #11355-300-000.Key Features• Carb overflow guide• Replaces OEM #11355-300-000• Honda part name: Guide,...
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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Honda CB750F CB750K carburetor screw kit

1977-78 Honda CB750F / CB750K Carburetor Screw Kit

$19.95 USD
49-0772
Refresh your 1977-78 CB750 carb screws with this Carburetor Screw Kit. Get a new set of screws to clean up the look of your...
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 CB750 CB650 CB550 CB125 carb float 16013-405-004

Honda CB750 / CB650 / CB550 / CB125 Carb Float ~ Replaces 16013-405-004

$27.95 USD
20-6509
Replace your late-'70s CB carb float with this Carb Float with Pin, replacing OEM #16013-405-004 / #16013-393-004 / #16013-KCY-670 / #16013-MN1-671.4 carb floats are...
Honda CB750A CB750F CB750K carb bolt kit

1976-78 Honda CB750A / CB750F / CB750K Carb Bolt Kit

$26.95 USD
73-1043
Restore your carburetor hardware with this Carburetor Bolt and Washer 46-Piece Kit, a complete bolt kit for all 4 carburetors.Key Features• Carburetor bolt and...
Honda CB750 CB550 CB400 CB350 Keihin pd carburetor felt throttle shaft seal set 6

Honda CB750 / CB550 / CB400 / CB350 Keihin PD Carburetor Felt Throttle Shaft Seal Set/6

$21.95 USD
33-0045
Replace worn or missing felt throttle shaft seals during carburetor service on compatible vintage Honda CB models with Keihin PD carburetors. These felt seals...
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1977 Honda CB750K · Carb Floats & Components Buying guide

Identify the small carb part and its package quantity

These listings cover fuel-control components, seals and fasteners. Keep a float, pump diaphragm, drain screw and felt throttle-shaft seal separate in your order; their functions and supplied quantities differ even within the same carburetor assembly.

Parts to consider

Honda CB750 / CB650 / CB550 / CB125 Carb Float ~ Replaces 16013-405-004 Carb float with pinFloat supplied with its pin, replacing 16013-405-004, 16013-393-004, 16013-KCY-670 and 16013-MN1-671. The listing specifies four per bike, ordered as needed.View part Honda CB750 / CB650 / CB450 Carb Pump Diaphragm ~ Replaces 16021-393-004 Accelerator-pump diaphragm kitOne diaphragm with rod and one bellow rubber; replaces 16021-393-004, 16021-393-014 and 16021-MC9-771.View part Honda CB Float Bowl Drain Screw O-Rings Pk/4 Four drain screw O-ringsSeal-only four-pack for the listed later carburetors. Drain screws are not listed in this package.View part

Related parts: Individual drain screw with O-ring · 46-piece bolt and washer kit · Six Keihin PD felt throttle-shaft seals

Keep the float and pump repair distinct

The float and accelerator-pump diaphragm are separate components with different replacement references. Compare the removed parts with the chosen listing; the diaphragm-and-bellow package is not described as a complete pump mechanism.

Compare hardware coverage before ordering individual screws

The 46-piece bolt-and-washer kit is described for all four carburetors, but does not itemize the fasteners. The separate screw kit, part 49-0772, lists its individual screw sizes and drain-screw contents. Use that distinction when checking whether a package covers the damaged hardware.

Choosing parts for your 1977 CB750K

Which package avoids duplicating new drain screws and seals?

For seal-only work, the four-pack supplies drain O-rings. Each separate drain screw already includes an O-ring, and the screw kit supplies four drain screws with O-rings. Compare those included pieces before buying more than one package for the same repair.

What exact screw sizes are itemized in screw kit 49-0772?

In addition to its four drain screws with O-rings, it lists one 4 × 8 screw, eleven 4 × 12 screws and twelve 4 × 16 screws, each with a lock washer. Compare the removed hardware and required locations; the 46-piece bolt kit does not provide the same itemized list.

Does the pump diaphragm’s 89 mm pin condition apply to this CB750K?

That end-to-end pin-length condition is attached to the CB650 applications in the diaphragm listing, not its 1977–78 CB750K line. Compare the pump fitted and the listed replacement references before ordering; do not treat the CB650 note as a factory CB750K measurement.

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