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1972 Honda CB450K Rebuild Coverage, Valve Parts & Pilot Choices

Choose the scope of carburetor service on your 1972 CB450K before ordering metering parts. A kit may cover several internal components, while a valve set or pilot jet serves a specific need. Confirm fitted carburetor identity, required contents and the number being serviced first.

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Currently viewing Carb Rebuild & Jetting

Honda motorcycle parts

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Honda CB750 CB500 CB450 CB125 CB100 float valve 16011-302-004

Honda CB Float Valve ~ Replaces 16011-302-004

$9.95 USD
48-5009
Replace your float needle and seat with this Float Valve Set (needle and seat), replacing OEM #16011-302-004 / #16011-375-004.Key Features• Float valve set (needle...
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Honda CB450 premium carb rebuild kit

1965-74 Honda CB450 Premium Carb Rebuild Kit

$21.95 USD
48-1228
Restore smooth fuel delivery with this Premium Carburetor Rebuild Kit, designed to refresh worn components inside your carburetor and restore proper performance. This kit...
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Honda CB450K CL450K5 CL450K6 carb rebuild kit

1972-74 Honda CB450K / CL450K5 / CL450K6 Carb Rebuild Kit

$20.95 USD
48-1396
Rebuild your later 5-speed CB450 or CL450 carbs with this Carb Rebuild Kit, designed for the 5-speed 450s.Note: each kit rebuilds one carb, order...
Honda CB500T CB450 CB360 CB350 slow pilot jet #35 99124-286-0351

Honda CB500T / CB450 / CB360 / CB350 Slow / Pilot Jet #35 ~ Replaces 99124-286-0351

$7.00 USD
48-1587
Restore clean idle and low-speed fuel metering with this aftermarket Keihin-style slow / pilot jet, size #35. It replaces Honda OEM #99124-286-0351 for the...
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1972 Honda CB450K · Carb Rebuild & Jetting Buying guide

Distinguish application coverage from itemized contents

The later five-speed-450 kit states one-carburetor coverage without a detailed contents list. The premium kit lists particular gaskets, valve pieces and jet sizes. A needle-and-seat set and the separate #35 pilot offer narrower choices after their own compatibility checks.

Parts to consider

1972-74 Honda CB450K / CL450K5 / CL450K6 Carb Rebuild Kit One-carburetor kit for the later 450Kit described for the five-speed CB450K application covering 1972–74. Each purchase rebuilds one carburetor. Identify the carburetors retained on the motorcycle and confirm any essential contents; individual jet sizes and a detailed piece list are not provided.View part Honda CB Float Valve ~ Replaces 16011-302-004 Needle and seat for a focused valve repairFloat-valve set referencing Honda 16011-302-004 / 16011-375-004. The stated components are the needle and seat. Compare the valve fitted to the carburetor; a float or full gasket-and-jet package is not identified as included.View part 1965-74 Honda CB450 Premium Carb Rebuild Kit Premium kit with specified internal partsOne-carburetor kit listing bowl and top gaskets, O-rings, float needle, #2.0 seat, #125 main jet, #40 pilot and D8 needle among its contents. Compare those pieces with the planned service; their sizes describe the supplied kit.View part

Related parts: Separate #35 pilot metering choice

Use kit sizes as a contents description

The premium kit supplies a #125 main, #40 pilot and D8 needle. The separately offered jet is #35. Neither listing makes these sizes the default calibration for every retained carburetor, replacement intake or exhaust arrangement. Determine the intended metering requirements before substituting one size for another.

Count kits by the carburetors selected for service

Both kits expressly cover one carburetor each. Match each carburetor before using two kits for a two-carburetor repair. The separate pilot is sold each; its quantity follows the jets being changed, with pattern and size still needing confirmation for each carburetor.

Carburetor kit and metering decisions

What can I establish from the later-450 kit’s description?

It identifies the five-speed 450 application, including 1972–74 CB450K, and one-carburetor coverage. It does not name a fitted carburetor code, jet calibration or complete component list. Confirm any essential piece and actual carburetor match before relying on it for a particular rebuild.

When could adding the float valve duplicate kit contents?

The premium kit explicitly includes a float needle and #2.0 seat. The standalone valve set includes a needle and seat. Compare the retained valve and planned repair with those contents before purchasing both; the other kit needs a separate contents check.

Does a #35 pilot purchase correct the premium kit automatically?

It is a different-size metering choice, with an explicit jet-pattern and intended-size check. The kit’s #40 is a supplied component. Choose the required pilot for the fitted carburetor and operating arrangement instead of treating the smaller number as an automatic replacement.

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