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1972 Honda CB450K Carburetor Service & Tank Connections

Trace the fuel repair on your 1972 CB450K from the tank fitting to the carburetor component being renewed. A kit, petcock and intake holder answer different needs. Identify the assemblies retained on the bike, then compare contents and purchase quantities for each service location.

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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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1972 Honda CB450K · Fuel System Buying guide

Build the order around the component needing service

The later-450 kit covers one carburetor; the premium option names its internal pieces. The petcock specifies a tank-outlet thread, and the holder supplies its gasket. These details help separate an internal carburetor repair from intake mounting or tank-fitting work.

Parts to consider

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 Honda CB Fuel Petcock ~ Replaces 16950-292-000 Thread-checked fuel petcockPetcock referencing Honda 16950-292-000 and specifying M16 × 1.5 threads. The description asks for verification before ordering. Match the outlet on the actual tank, including a tank substituted during restoration.View part Honda CB Carb Holder ~ Replaces 16211-283-000 Single intake holder and gasketHolder referencing Honda 16211-283-000, supplied with gasket. One holder per purchase; two used per bike. The specified band clamp is separate. Compare the intake connection before choosing the quantity and any additional clamp hardware.View part

Related parts: Later-450 kit coverage · Vacuum connection requirements · Measured 49mm pod installation

Compare included pieces before adding individual repairs

The premium kit lists float needle and seat, gaskets and metering components. The separate valve set addresses a narrower needle-and-seat repair. Read the chosen kit’s contents before adding the same valve parts, and confirm missing contents of the later-450 kit when a particular component is essential.

Resolve universal-tool and filter fit at the carburetor

The synchronizer requires suitable accessible vacuum connections despite its two-carburetor design and included 5mm extensions. The pod requires measurement of the inlet outside diameter and available mounting space. Treat those as separate checks on the actual carburetors, including any replacements fitted during earlier work.

Fuel service scope and fitting questions

How can I choose a kit if the carburetors were changed?

Identify both fitted carburetors and compare their required parts with each kit’s application and contents. The later-450 kit names 1972–74 CB450K coverage but no carburetor model code or detailed piece list. Confirm suitability for the changed carburetors instead of applying the motorcycle year to them automatically.

What should I verify before choosing a petcock for another tank?

Check the actual threaded outlet and intended valve attachment. This petcock states M16 × 1.5 and asks for verification before ordering. A tank installed during restoration needs that direct check even though the motorcycle remains a 1972 CB450K.

How do the kit and holder purchase quantities differ?

Each rebuild kit covers one carburetor. One holder with its gasket is supplied per holder purchase, and two holders are used per motorcycle. Count the components being renewed and check the separately identified band clamps before completing the order.

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