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1966 Honda CB450K Carburetor Rebuild Kits & Jetting

Choose a focused needle-and-seat repair or the broader premium carb kit for your 1966 CB450K. A separate #35 pilot jet serves a different purpose. Match the removed components and desired jet size before deciding which parts belong in your order.

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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...
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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1966 Honda CB450K · Carb Rebuild & Jetting Buying guide

Choose between a kit, float valve and pilot jet

The premium kit contains sealing and metering parts for one carburetor. The float valve supplies a needle and seat, while the separate pilot listing supplies a #35 jet. Compare scope as well as reference numbers.

Parts to consider

1965-74 Honda CB450 Premium Carb Rebuild Kit Premium carburetor rebuild kitSupplies internal service parts for one carburetor, including a #125 main jet, #40 pilot jet, D8 needle, float needle and #2.0 seat, gaskets and listed small parts. Compare the contents with your installed carburetor.View part Honda CB Float Valve ~ Replaces 16011-302-004 Float needle and seat setA float valve set containing the needle and seat, referencing Honda 16011-302-004 / 16011-375-004. Use the removed components to confirm the application; this is not a replacement float.View part Honda CB500T / CB450 / CB360 / CB350 Slow / Pilot Jet #35 ~ Replaces 99124-286-0351 #35 slow / pilot jetSeparate Keihin-style #35 pilot jet referencing Honda 99124-286-0351. Confirm the jet pattern and desired size; it differs from the kit’s #40 pilot. Sold individually; order the quantity required.View part

Avoid ordering the same repair twice

The premium kit already lists a float needle and #2.0 seat. The separate float valve is a needle-and-seat set for a targeted repair. Compare both listings with your actual carburetor parts before buying them together; a shared function does not establish that every supplied component is identical.

Use the contents list as the starting point

The kit lists a #125 main jet, #40 pilot jet and D8 needle. Record what is installed before replacing metering parts. Keep the #35 pilot as a separately chosen size, and do not treat either the kit contents or the model category as proof of your required tuning calibration.

Buying questions for your CB450K

Does the separate float valve include the carburetor float?

It contains the float needle and seat. The float itself is a different part and has its own listing. A needle-and-seat purchase therefore does not cover a damaged or missing float, nor does it supply the full rebuild kit’s gaskets.

Is the kit’s pilot jet the same size as the separate jet?

The premium kit lists a #40 pilot jet; the separate product is #35 and references Honda 99124-286-0351. Check the carburetor’s jet pattern and the size you intend to use before choosing or combining these products.

Can I choose the kit solely from the CB450K year?

The listing includes the 1966 application, but the motorcycle may have different carburetors or internal parts from earlier work. Compare the installed components with the listed contents, including needle marking and jet sizes, before assuming every supplied part is needed.

Not sure which part you need?

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

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