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1983 Honda CB450SC Nighthawk Carburetor Service Scope & Seals

The 1983 Honda CB450SC Nighthawk service kit belongs to the later 1983–1986 carburetor application. Its coverage is one carburetor per kit, with two specified for a full-system service. Separate bowl gaskets and needle-only replacements let you plan a narrower order after identifying the parts needing attention.

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Honda motorcycle parts

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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 CB450SC carb rebuild kit

1983-86 Honda CB450SC Carb Rebuild Kit

$17.95 USD
48-1397
Rebuild your CB450SC Nighthawk carb with this Carb Rebuild Kit.Note: each kit rebuilds one carb, order the quantity you require.Key Features• Carb rebuild kit•...
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1983 Honda CB450SC Nighthawk · Later Carb Kit & Seals Buying guide

Choose a kit or focused sealing order from the inspection

The kit does not publish exact jet sizes or a complete item inventory. The gasket is sold individually, while the 16155-413-751 needle excludes the mating seat. Confirm which pieces are needed and compare them with the fitted carburetors before assuming a service package supplies the whole repair.

Parts to consider

1983-86 Honda CB450SC Carb Rebuild Kit One-carb kit for the later Nighthawk applicationOne kit services one carburetor; its FAQ specifies two for the complete 1983–1986 system and distinguishes the 1982 kit.View part Honda CB Carb Float Needle ~ Replaces 16155-413-751 Individual float needle without seatOne 16155-413-751 replacement needle is supplied, with no seat included; two are specified for the listed CB450 twins.View part Honda CB1100/CB1000/CB900/CB750 Float Bowl Gasket Bowl gasket available as an individual partSeparate gasket/O-ring is listed for the 1983 CB450SC; compare the original bowl’s sealing shape.View part

Make the installed carburetor comparison before opening the kit

The kit FAQ requires comparison of the original jets, needles, gaskets and O-rings as well as carburetor identification and bowl shape. Use that requirement when the motorcycle’s history is uncertain. No exact jet calibration or promised individual kit component can be derived from the current short description.

Use the individual valve package for an identified need

The needle FAQ directs inspection of the mating seat and inlet for corrosion, wear or debris. It explicitly leaves the seat out of the package. A damaged seat therefore needs a separate compatible repair decision even when the new needle itself matches the stated Honda reference.

Common questions

How many later-application kits cover a complete matched carburetor system?

The listing specifies two kits because each services one carburetor. That quantity applies to the matched later 1983–1986 Nighthawk application. Confirm the installed carburetor identity first, particularly where an earlier assembly or other replacement may have been fitted.

Does the kit listing confirm the jet calibration I need?

No jet sizes or exhaustive contents inventory are published in the current listing. Compare the original metering pieces as its FAQ directs and confirm a particular required component before ordering. The later-application title alone does not specify its exact jet calibration.

What should I examine before ordering both individually supplied float needles?

The needle listing specifies two for the listed CB450 twins and excludes the seats. Inspect each mating seat and fuel inlet for wear, corrosion or debris. Count the needles actually needing replacement and assess any seat repair as a separate requirement.

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