VintageCB750 Supplying CB Riders Since 2010

About Us Why Us? Reviews Shipping Info Returns Contact Us
Wish Lists
0 My Cart

Your cart is currently empty.

Browse all parts
Total (USD): $0.00
View cart
Menu
Search
Wish
Cart 0
My motorcycle Choose your Honda CB model

Search parts

Searching all Honda CB parts

Example: brake pads or oil filter.

1981 Honda CB900C Custom Carb Floats & Small Parts

Use the fault location to choose small carburetor parts for your 1981 CB900C Custom. A float with pin, accelerator-pump diaphragm and connector-tube O-ring set address different assemblies. Count the supplied pieces carefully when servicing several carburetors or renewing their fastening hardware.

Close ×
Your saved bike Choose your Honda CB model

Shop By Category

Most orders ship same or next business day Fitment guarantee Listed for your exact model and year? We’ll make it right if it doesn’t fit as described. Mechanic-backed support Ask our team for help choosing the right Honda CB part.
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 CB900 CB750 carb pump diaphragm 16021-679-005

1979-83 Honda CB900 / CB750 Carb Pump Diaphragm ~ Replaces 16021-679-005

$27.95 USD
20-9042
Rebuild your DOHC CB750's Keihin carb accelerator pump with this Carb Pump Diaphragm, replacing OEM #16021-679-005. Kit contains 1 diaphragm with rod and 1...
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 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 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 CB1000 CB900 CB750 carb rubber passage plugs pk 5 16010-425-671

Honda CB1000 / CB900 / CB750 Carb Rubber Passage Plugs Pk/5 ~ Replaces 16010-425-671

$10.49 USD
48-5001
Replace your float bowl and cover access plugs with this Carb Rubber Passage Plugs Pack of 5. Fits in float bowl and cover access...
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 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 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 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...
compare

1981 Honda CB900C Custom · Carb Floats & Small Parts Buying guide

Distinguish bowl leaks from the 1981 fuel-control diaphragm

The 1981 Custom has a separate fuel-line diaphragm in addition to the accelerator pump and air-cutoff valves. A dry bowl, an overflowing bowl and fuel leaking between carburetors call for different checks. Locate the fault before buying a float or diaphragm kit.

Parts to consider

Honda CB Carb Float ~ Replaces 16013-413-851 Carburetor float with pinReplacement float supplied with its pin; four floats are specified per motorcycle.View part 1979-83 Honda CB900 / CB750 Carb Pump Diaphragm ~ Replaces 16021-679-005 Accelerator-pump diaphragm kitOne diaphragm with rod and one bellows rubber; reference 16021-679-005.View part Honda CB Carb Fuel Connector Tube and Accelerator Tube O-Rings Connector-tube O-ring setTwelve O-rings for carb fuel connector and accelerator tubes.View part

Related parts: Four drain-screw O-rings · Bowl screws with washers

Check the float valve before buying another float

Honda calls for inspecting the float valve and seat for grooves, nicks and deposits, and checking valve operation. A new float cannot make a damaged seat seal. The original float-level procedure measures with the float just touching the valve and calls for replacement if the level is out of specification; do not improvise a bending adjustment.

A connector leak means a different repair

The twelve-ring package serves fuel connector and accelerator tubes between the carburetors. Renewing those seals involves careful rack separation and reassembly, followed by checks for free linkage movement and proper adjustment. Bowl and drain-screw seals are separate. Compare the original fasteners by position before deciding how many two-screw packs are needed.

Buying questions

Will a new float cure fuel overflowing from a carburetor?

Not necessarily. Inspect the needle, its seat, debris in the fuel supply and free float movement. Honda’s float-level check determines whether the float itself needs replacement; fitting a float without finding the cause can leave the leak unchanged.

Can connector-tube O-rings be changed like an outside bowl gasket?

They seal tubes between carburetor bodies, so access requires careful separation of the rack. Preserve linkage and spring positions and follow Honda’s reassembly and synchronization checks. The twelve-ring package is not a float-bowl gasket set.

Is the accelerator-pump diaphragm the 1981 automatic fuel valve?

No. Honda documents the fuel-line diaphragm separately in the 1981 supplement. The featured pump kit contains a diaphragm with rod and bellows rubber for the accelerator pump. Identify the assembly and its hose or linkage connections before choosing a kit.

Not sure which part you need?

Send your model and year, plus photos of your existing part and any changes to the original setup.

Ask a fitment question
Parts categories for 1981 Honda CB900C

Your cart

×