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1974 Honda CB450K Internal Carburetor Service, Intake Holders & Tank Valves

Build the fuel order for your 1974 CB450K around the components actually needing renewal. Internal carburetor parts, intake holders and the tank valve have different attachments and package contents. Identify those locations before adding metering parts, bowl fittings or universal intake accessories.

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Honda motorcycle parts

Choose your model and year to see parts listed for your bike.

Honda CB front fuel tank holder rubber 17611-283-010

Honda CB Front Fuel Tank Holder Rubber ~ Replaces 17611-283-010

$7.87 USD
02-6534
Secure the front of your fuel tank with this Front Fuel Tank Holder Rubber, a direct replacement for OEM #17611-283-010. Fits a broad range...
Honda CB750 CB550 CB500 CB450 type filler chrome cap 17510-323-310

Honda CB OEM Type Filler Chrome Cap ~ Replaces 17510-323-310

$49.95 USD
20-0045
Replace your OEM-type filler cap with this OEM Type Gas/Fuel Tank Chrome Cap, including gasket and hinge pin with E-clip for easy installation. Replaces...
Honda CB750 CB550 CB500 CB450 CB400 gas fuel tank cap latch assembly

Honda CB Gas/Fuel Tank Cap Latch Assembly

$44.95 USD
20-0083
Replace your gas cap latch with this Gas/Fuel Tank Cap Latch Assembly. Includes a chrome latch, return spring, latch mounting pin, and C-clip.Key Features•...
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...
Honda CB750 CB550 CB500 CB450 CB400 float bowl drain screw

Honda CB Stock Type Float Bowl Drain Screw

$7.50 USD
48-5041
Replace your stock-type float bowl drain screw with this Float Bowl Drain Screw with O-Ring.Note: sold each, order the quantity you require.Key Features• Stock-type...
Honda CB750 CB450 CB350 CL350K3 gas cap rubber seal 17525-300-000

Honda CB Gas Cap Rubber Seal ~ Replaces 17525-300-000

$5.95 USD
20-0038
Replace your early Honda gas cap rubber seal with this Gas Cap Rubber Seal, replacing OEM #17525-300-000. Fits the earliest CB750K, CB450K/CL450K, and CB350K/CL350K/SL350K.Key...
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Honda CB1000 CB900 CB750 fuel tank emblem clamp nut 87311-634-600

Honda CB Fuel Tank Emblem Clamp Nut ~ Replaces 87311-634-600

$6.25 USD
99-5267
Secure your fuel tank emblem properly with this Fuel Tank Emblem Clamp Nut, designed as a direct replacement for the original Honda hardware. This...
Honda CB450 CB360 CB350 CL350K0 CL350K2 fuel petcock 16950-292-000

Honda CB Fuel Petcock ~ Replaces 16950-292-000

$34.95 USD
29-0542
Replace your CB450, CL450, CB350, or CB360 fuel petcock with this Fuel Petcock, replacing OEM #16950-292-000 with M16 x 1.5 threads. Please verify the...
Honda CB750 CB550 CB450 CB400F fuel tank cap latch 17510-323-310

Honda CB Matte Black Fuel Tank Cap with Latch ~ Replaces 17510-323-310

$69.95 USD
07-9967
Restore your classic Honda's tank with a factory-look matte-black finish using this Matte Black OEM-Type Fuel Tank Cap with Latch Assembly. A direct replacement...
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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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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 CB750 CB550 CB400F CB450 CB360 tank cap latch assembly black

Honda CB Gas/Fuel Tank Cap Latch Assembly ~ Black

$29.95 USD
01-9934
Replace a broken, missing, or worn-out fuel cap latch with this Gas/Fuel Tank Cap Latch Assembly in black. Includes the black latch, return spring,...
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 CB750 CB550 joker machine black gas tank cap latch assembly

Honda CB Joker Machine Black Gas Tank Cap Latch Assembly

$79.95 USD
73-1157
Upgrade your fuel tank latch with the Joker Machine Custom Black Gas/Fuel Tank Cap Latch Assembly. Designed as a premium alternative to the discontinued...
Honda CB450 CL450K0 CL450K2 CL450K3 CL450K4 carb holder 16211-283-000

Honda CB Carb Holder ~ Replaces 16211-283-000

$23.95 USD
48-1475
Replace a single CB450 or CL450 carb holder with gasket using this Carb Holder with Gasket, replacing OEM #16211-283-000.Note: this is for one holder....
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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1974 Honda CB450K · Fuel System Buying guide

Start with the retained assembly and the part being renewed

The premium kit provides named internal components for one carburetor. A holder comes singly with a gasket and requires separate clamp consideration. The petcock specifies a tank thread to verify. Each repair needs its own comparison before several purchases are combined.

Parts to consider

1965-74 Honda CB450 Premium Carb Rebuild Kit Premium kit listing its internal service partsOne-carburetor kit lists bowl and top gaskets, O-rings, plug, float needle, #2.0 seat, #125 main, #40 pilot, D8 needle, mixture screw, spring and C-clip. Compare these supplied components with the fitted carburetor and the repair planned; their sizes are not a universal calibration prescription.View part Honda CB Carb Holder ~ Replaces 16211-283-000 One intake holder with gasket suppliedHolder references Honda 16211-283-000 and comes with a gasket. One holder is supplied per purchase; two are used per bike. The required band clamp is separately identified. Compare the retained carburetor and holder attachment before calculating a one-side or both-side repair.View part Honda CB Fuel Petcock ~ Replaces 16950-292-000 Petcock specified with M16 × 1.5 threadsValve replaces Honda 16950-292-000 and explicitly requires checking its M16 × 1.5 thread against the tank. Match the outlet on the tank currently fitted, particularly after a tank substitution. That thread check does not establish filler-cap or hose dimensions.View part

Related parts: Later-450 kit application and contents check · Vacuum access before choosing a gauge set · Inlet measurement for a universal pod

Calculate coverage for the particular service locations

Each rebuild kit covers one carburetor, and each holder purchase supplies one holder with gasket. Two holders used per bike describes the application requirement, not a two-piece package. Count the locations being renewed and compare named contents before adding separate valves, screws or clamps.

Treat filter and tool connections as independent buying checks

The pod needs an inlet outside-diameter measurement and space assessment, with possible tuning work. The synchronizer requires compatible accessible vacuum connections despite its included 5mm-threaded adapters. Check the carburetors used before treating either universal item as suitable for the planned work.

Planning a fuel order around retained components

What should I record before choosing parts for carburetors installed by a previous owner?

Identify the carburetors and the specific fittings being renewed, then compare the intended kit, valve, drain and holder applications. The later-450 kit does not give a carburetor model code or detailed contents. Confirm missing identification and coverage details before using motorcycle year as the deciding factor.

How do I plan a holder repair alongside an internal carburetor rebuild?

Compare the holder attachment and reference separately from the internal kit. The holder includes its gasket and supplies one unit, with a separate clamp specified. A carburetor kit’s gaskets and O-rings do not identify that holder assembly as supplied.

What should I establish before using the synchronizer on unfamiliar carburetors?

Locate accessible vacuum connections and verify their compatibility with the gauge set’s adapters and hoses. The extensions have 5mm threads, but the description is universal rather than a CB450K port drawing. Confirm the actual connection needed before ordering the tool.

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