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1965 Honda CB450K Fuel System & Carburetor Parts

For your 1965 CB450K, choose between a carburetor service kit, a separate pilot jet and a custom pod filter. These solve different jobs. Identify the carburetors and intake arrangement on your motorcycle before selecting replacement parts or tuning equipment.

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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...
Universal motorcycle carburetor synchronizer vacuum gauge 2 carb synchronizer

Universal Motorcycle Carburetor Synchronizer Vacuum Gauge ~ 2 Carb Synchronizer

$54.95 USD
37-0003
Carburetor and throttle body synchronizer kit for bikes with 2 Carbs. Makes synching your carburetor setup fast and easy! For use with Honda, Kawasaki,...
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Universal motorcycle 49mm chrome cap pod air filter

Universal Motorcycle 49mm Chrome Cap POD Air Filter

$24.95 USD
15-0034
49mm Chrome Cap POD Air Filter for custom or restoration work on classic Honda CB motorcycles. Measure the outside diameter of the carburetor inlet...
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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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1965 Honda CB450K · Fuel System Buying guide

Match the parts to the carburetors you have

The premium kit supplies internal service parts for one carburetor. The separate #35 pilot jet is another metering choice, while the 49mm pod filter and vacuum synchronizer require checks specific to your installed setup.

Parts to consider

1965-74 Honda CB450 Premium Carb Rebuild Kit CB450 premium carburetor rebuild kitListed for the 1965 CB450K. Each kit services one carburetor and includes a #125 main jet, #40 pilot jet, D8 needle, float needle and seat, gaskets and other small service parts.View part Honda CB500T / CB450 / CB360 / CB350 Slow / Pilot Jet #35 ~ Replaces 99124-286-0351 #35 slow / pilot jetA separately supplied Keihin-style #35 pilot jet referencing Honda 99124-286-0351. Confirm both the jet pattern and chosen size. It differs from the #40 pilot jet supplied in the premium kit.View part Universal Motorcycle 49mm Chrome Cap POD Air Filter 49mm chrome-cap pod filterA custom intake option that mounts at the carburetor inlet. Measure the inlet outside diameter and surrounding clearance first. Sold individually; order the quantity required. Pod filters may need jetting and tuning changes.View part

Related parts: Two-gauge vacuum synchronizer

Plan the service around each carburetor

One rebuild kit covers one carburetor, so count the carburetors being serviced before ordering. Check the full contents list against the worn parts you need to replace. The listed jets describe what comes in the package; they do not establish the correct calibration for every carburetor or modified intake.

Keep tuning choices separate from replacement parts

The #35 pilot jet is not an extra #40 kit jet. Choose it only when its pattern and size suit your tuning plan. The synchronizer compares vacuum through compatible connections; buying the two-gauge tool does not establish that your carburetors have suitable connection points.

Fuel system buying questions

Does the premium kit supply parts for both carburetors?

No. The listing specifies one carburetor per kit. Order by the number of carburetors you are rebuilding, and compare its parts list with the work required. A carburetor rebuild kit and a synchronizer are separate purchases.

Can I use the #35 pilot jet instead of the kit’s #40?

Only after confirming the required jet pattern and calibration for your installed carburetor. The separate jet references 99124-286-0351; the kit lists a #40 pilot. Neither number alone proves what your motorcycle should use.

Will the two-gauge synchronizer connect directly to my CB450K?

Check the available vacuum connection points before ordering. The tool includes 5mm-thread extensions, hoses and dampening valves. Its universal listing does not verify suitable ports on every 1965 CB450K carburetor or on replacement carburetors.

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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