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1978 Honda CB750K Carburetor Kits & Jetting

Two different carb service packages are listed for this 1978 CB750K, alongside gaskets and jet choices. The kit with jets contains alternatives for specified applications; the packing kit has a shorter contents list. Choose from the fitted carburetor and the work being done.

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Currently viewing Carb Rebuild & Jetting

Honda motorcycle parts

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Honda CB1000 CB900 CB750 performance main jet kit

Honda CB1000 / CB900 / CB750 Performance Main Jet Kit

$39.95 USD
48-2111
Tune your CB to match your engine mods with this Performance Main Jet Kit. Includes a total of 16 main jets for Keihin carbs....
Honda CB1000 CB900 CB750 CB700 ultimate performance main jet kit

Honda CB1000 / CB900 / CB750 / CB700 Ultimate Performance Main Jet Kit

$64.95 USD
48-2112
Cover every tuning scenario with this Ultimate Performance Main Jet Kit. Includes a total of 44 main jets for Keihin carbs. Use this jet...
Honda CB750F CB750K carb rebuild kit

1977-78 Honda CB750F / CB750K Carb Rebuild Kit

$31.95 USD
48-1737
Rebuild your late 1970s CB750K or CB750F Supersport carb with this Carb Rebuild Kit, made in Japan. Contains float bowl gasket, carb top gasket,...
Honda CB750 CB650 CB550 float bowl gasket

Honda CB750 / CB650 / CB550 Float Bowl Gasket

$9.95 USD
20-8030
Replace your late-'70s CB float bowl gasket with this Float Bowl Gasket (O-ring).Key Features• Float bowl gasket (O-ring)Fitment / Compatibility• Honda CB750K (1977‑78)• CB750F...
New
Honda CB750 CB650 CB125 press in pilot jet set size #40 (pk 4)

Honda CB750 / CB650 / CB125 Press In Pilot Jet Set ~ Size #40 (Pk/4)

$24.64 USD
48-9034
#40 pilot jet set for applications that use press-in style jets. These control fuel flow at idle and low throttle, making them important for...
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Honda CB750 CB650 CB550 CB400 CB125 float needle 16011-382-004

Honda CB Float Needle ~ Replaces 16011-382-004

$8.95 USD
48-5010
Replace your float needle (only) with this Float Needle, replacing OEM #16011-382-004.Key Features• Float needle (only)• Replaces OEM #16011-382-004• Honda part name: Valve Set,...
New
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Honda CB750 CB650 CB125 press in pilot jet set size #38 (pk 4)

Honda CB750 / CB650 / CB125 Press In Pilot Jet Set ~ Size #38 (Pk/4)

$24.64 USD
48-9033
Press In Pilot Jet Set/4 ~ #38 Size Please Double Check you Require the #38 Size Before Ordering Fits: Honda CB750K (1977-78), CB750F (1977-78)...
New
Honda CB750 CB650 CB125 press in pilot jet set size #42 (pk 4)

Honda CB750 / CB650 / CB125 Press In Pilot Jet Set ~ Size #42 (Pk/4)

$24.64 USD
48-9035
Pilot jet set sized at #42, designed for applications that use press-in style jets. A key component in fuel delivery at idle and low...
New
Honda CB750 CB650 CB125 press in pilot jet set size #35 (pk 4)

Honda CB750 / CB650 / CB125 Press In Pilot Jet Set ~ Size #35 (Pk/4)

$24.64 USD
48-9028
Replace your press-in pilot jets with this Press In Pilot Jet Set of 4, size #35. Please double-check that you require the stock #35...
Honda CB750F CB750K CB750P carb rebuild kit 16010-405-004

1977-78 Honda CB750F / CB750K / CB750P Carb Rebuild Kit ~ Replaces 16010-405-004

$24.95 USD
48-1995
Refresh the float-valve seals on your 1977-78 CB750 carbs with this Carb Packing Kit (Float Valve Kit), replacing OEM #16010-405-004. Kit contains float bowl...
Honda CB750F CB750K carb top gasket 16010-405-004

1977-78 Honda CB750F / CB750K Carb Top Gasket ~ Replaces 16010-405-004

$9.50 USD
73-0953
Replace your carb top gasket with this Carburetor Top Gasket, replacing OEM #16010-405-004.Key Features• Carburetor top gasket• Replaces OEM #16010-405-004• Honda part name: Gasket...
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1978 Honda CB750K · Carb kits & jetting Buying guide

Compare the two carb kits before ordering jets separately

Both service packages cover one carburetor, but only one lists main jets and a slide needle. Separate kit contents from tuning decisions, and confirm the press-in pilot style before selecting a size.

Parts to consider

1977-78 Honda CB750F / CB750K Carb Rebuild Kit Rebuild kit with main jetsContains #105 and #110 main jets, D313 slide needle, float needle, gaskets, seals and listed screw alternatives.View part 1977-78 Honda CB750F / CB750K / CB750P Carb Rebuild Kit ~ Replaces 16010-405-004 Carb packing kitOne-carb package listing a bowl gasket, top gasket, O-rings and needle. Reference 16010-405-004.View part Honda CB750 / CB650 / CB125 Press In Pilot Jet Set ~ Size #40 (Pk/4) Four #40 press-in pilot jetsFour press-in jets in size #40. Confirm that both this style and size match the required application.View part

Related parts: Separate float bowl gasket · Sixteen-piece main jet assortment

Match the supplied screw alternative to the fitted carburetor

The kit names an air-fuel screw of 1978 F type and another of 1977–78 K type. Compare the removed screw and carburetor before selecting the supplied alternative; the shared package does not make both screws appropriate for one carburetor.

Do not confuse press-in pilots with other jet styles

The pilot products here explicitly use a press-in style and are offered in multiple sizes. The main-jet assortments are a different purchase for Keihin carburetors. Record the old jet markings and configuration before ordering; neither a broad model list nor a larger assortment identifies the size your motorcycle needs.

Common questions

How much extra size coverage does the 44-jet assortment add?

The 16-jet kit supplies four each of #105, #110, #115 and #120. The 44-jet kit adds four each of #100, #102, #108, #112, #118, #122 and #125. Choose the coverage needed for a verified tuning plan rather than assuming the larger assortment produces a performance gain.

What does the packing-kit contents list establish about a float-valve repair?

It lists a needle, bowl gasket, top gasket and O-rings under replacement reference 16010-405-004. A separate seat is not named. If the diagnosed repair needs the seat, confirm its supply before ordering rather than assuming the float-valve kit name includes it.

Does the #110 jet supplied for the K application determine the final setting?

The rebuild-kit description associates that supplied jet with the 1978 K application. It does not establish the final requirement for changed carburetors, intake or exhaust. Identify the fitted carburetor and its tuning requirements before selecting a supplied jet or a separate assortment.

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