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1981 Honda CB900F Carb Floats & Components

Float-bowl, accelerator-pump and carburetor-shaft repairs use different small parts on the 1981 CB900F. Compare the failed component before choosing a float, diaphragm or O-ring package. A twelve-ring connector set, four drain seals and an individual mixture-screw seal should not be counted alike.

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Currently viewing Carb Floats & Other Carb Components

Honda motorcycle parts

Choose your model and year to see parts listed for your bike.

Honda CB1100 CB1000 carb fuel connector tube and accelerator tube

Honda CB Carb Fuel Connector Tube and Accelerator Tube O-Rings

$15.26 USD
73-0831
Replace your carb fuel and accelerator tube O-rings with these Carburetor Fuel Connector Tube and Accelerator Tube O-Rings, 12 O-rings.Key Features• Carb fuel connector...
Honda CB1100 CB1000 CB900 CB750 DOHC screw set

Honda CB1100 / CB1000 / CB900 / CB750 DOHC Screw Set

$39.95 USD
73-0099
Refresh DOHC carb hardware top to bottom with this 71-Piece DOHC Screw Set. Includes front stay plate screws (8), CV cap screws (8), throttle...
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 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 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 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 screws pk 2 93892-04016-00

Honda CB Float Bowl Screws Pk/2 ~ Replaces 93892-04016-00

$2.50 USD
48-9031
Replace your float bowl screws with this Float Bowl Screws Pack of 2 (with lock washers), 2 screws and 2 washers per pack. These...
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 CB1100 CB1000 CB900 carb felt throttle and choke shaft seal set 12

Honda CB Carburetor Felt Throttle & Choke Shaft Seal Set/12

$32.95 USD
33-0044
Replace worn or missing felt throttle and choke shaft seals during carburetor service on compatible vintage Honda CB models. These felt seals are used...
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 CB1100 CB1000 CB900 CB750 CB650 carburetor cap screw set 8

Honda CB Carburetor Cap Screw Set/8

$5.80 USD
73-0100
Refresh your DOHC carb cap screws with this Carburetor Cap Screw Set of 8 with metal washers.Key Features• Carburetor cap screw set, 8 pieces•...
Honda CB1100 CB1000 Keihin pd carb felt throttle shaft seal set 6

Honda CB Keihin PD Carburetor Felt Throttle Shaft Seal Set/6

$18.95 USD
33-0043
Replace worn or missing felt throttle shaft seals on Keihin PD carburetors. These felt seals are used during carburetor service or restoration to help...
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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1981 Honda CB900F Supersport · Carb Components Buying guide

Identify the circuit and sealing joint

Locate the fault before choosing a float, pump diaphragm or sealing pack. The float needle controls fuel entry, the accelerator pump enriches throttle opening, and drain and connector O-rings seal different joints on the CB900F carburetor bank.

Parts to consider

Honda CB Carb Float ~ Replaces 16013-413-851 Carb float with pinReference 16013-413-851; four floats specified per motorcycle.View part 1980-82 Honda CB900 / CB450 / CB400 Carb Pump Diaphragm ~ Replaces 16021-413-751 Accelerator-pump diaphragm kitOne diaphragm with rod, one bellow rubber and O-rings.View part Honda CB Carb Fuel Connector Tube and Accelerator Tube O-Rings Connector-tube O-ring setTwelve O-rings for the fuel connector and accelerator tubes.View part

Related parts: Four drain-screw O-rings · Drain screw with O-ring · Eight carb-cap screws

Plan connector-tube work before splitting the bank

The twelve-ring package services fuel connector and accelerator tubes. Access requires enough carburetor separation to remove the tubes, so identify and record their locations before disassembly. A pump diaphragm, bowl gasket and connector seal perform different jobs even when the symptoms all involve fuel.

A drain leak is different from a connector-tube leak

The linked drain screw includes its own O-ring. A seal-only repair can use the separate drain O-rings if the screw and bowl seat are sound. Connector-tube O-rings seal between carburetors and require enough rack separation to remove the tubes; they are a different repair.

Buying questions

Will replacing a float stop every overflowing carburetor?

No. Check that the float moves freely and inspect the float needle, its seat and the fuel inlet for debris or damage. Verify the correct float level for the installed carburetor. A new float cannot repair a damaged needle seat.

How do I choose between drain-screw and connector-tube O-rings?

Trace the leak to its joint. Drain seals fit the individual bowl drain screws; connector seals fit tubes between the carburetors. Inspect the screw tip, groove and bowl seat before buying seals alone, and plan rack separation for connector-tube work.

Is the accelerator-pump diaphragm an air cut-off valve?

No. The pump diaphragm and rod serve the enrichment pump for throttle opening; air cut-off valves are separate assemblies. Confirm the affected circuit before ordering, since a split pump diaphragm and a damaged air cut-off valve do not use the same repair package.

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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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