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.

1982 Honda CB650SC Nighthawk Carb Floats & Pump Service

Floats, pump diaphragms and drain screws address different carburetor service points on the 1982 CB650SC. Identify the worn component before choosing its package. The diaphragm has an explicit 89mm pin condition, while the float includes a pin and the selected drain screw includes its O-ring.

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 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 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 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...
compare

1982 Honda CB650SC Nighthawk · Carb Floats & Pump Service Buying guide

Measure the pump pin and count the small parts separately

The float’s four-per-bike figure is an installation requirement, not a four-float package claim. The pump kit supplies a diaphragm with rod and bellows rubber only for the stated 89mm-pin application. Compare the actual parts before ordering.

Parts to consider

Honda CB Carb Float ~ Replaces 16013-413-851 Carburetor float with pinFloat with pin for reference 16013-413-851. Four floats are specified per motorcycle.View part Honda CB750 / CB650 / CB450 Carb Pump Diaphragm ~ Replaces 16021-393-004 Pump diaphragm with rodDiaphragm and bellows rubber. This application requires an 89mm end-to-end pin.View part Honda CB Stock Type Float Bowl Drain Screw ~-A Drain screw with O-ringIndividual float-bowl drain screw supplied with an O-ring.View part

Preserve the pump-kit condition

For the CB650SC, this diaphragm product requires an 89mm end-to-end pin. Its general Keihin description does not remove that check. Measure the old assembly and compare the fitted carburetor before selecting the diaphragm and bellows package.

Compare float and drain packages directly

The float comes with its pin and is ordered by the quantity needed. The selected drain screw is sold individually with an O-ring. Those contents help plan a focused repair without assuming either item supplies the other small parts in the carburetor bank.

Carb Floats & Pump Service questions

What pin length does the pump diaphragm require?

The listed application requires 89mm end-to-end. Measure the old pin before ordering rather than assuming all accelerator-pump diaphragms have the same rod length.

Can I use one float-height setting for every carburetor listed with this float?

Use the Honda specification for the exact carburetor fitted rather than borrowing a setting from another application. Check free movement of the float and valve, verify the specified float height or fuel level, and confirm fuel shuts off without leakage before use.

What if the bowl drain still leaks after replacing its screw or O-ring?

Inspect the screw tip, O-ring groove, bowl seat and surrounding bowl for damage or debris. A new seal cannot repair a damaged mating surface. Avoid using extra tightening force to mask the leak; it can damage the screw or bowl.

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 1982 Honda CB650SC Nighthawk

Your cart

×