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1981 Honda CB750K Fuel & Intake Parts

The 1981 CB750K fuel inventory includes one-carb service packages, pump components, holder and airbox-boot sets, control cables and tank fittings. Decide which assembly needs work before buying. Compare the parts currently fitted with each listing so a large package does not obscure a small repair.

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Honda motorcycle parts

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Honda CB 54mm black round pod air filter

54mm Round Pod Air Filter with Black End Cap

$24.95 USD
15-0169
Replace worn, damaged or restrictive clamp-on filters with this aftermarket 54mm round pod air filter. The black end cap gives the filter a darker...
Honda CB1100 CB1000 Keihin pd carb felt throttle shaft seal set 6

Honda CB Keihin PD Carburetor Felt Throttle Shaft Seal Set/6

$18.95 USD
33-0043
Replace worn or missing felt throttle shaft seals on Keihin PD carburetors. These felt seals are used during carburetor service or restoration to help...
Honda CB900 CB750 CB650 air cut off valve with cover 16048-429-771

Honda CB Air Cut Off Valve With Cover ~ Replaces 16048-429-771

$34.95 USD
48-9029
Replace your carb air cut-off valve with this Carb Air Cut-Off Valve with Cover. Replaces OEM #16048-429-771 (diaphragm), #16048-425-771 (spring + 1 O-ring), and...
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1981 Honda CB750K · Fuel system Buying guide

Choose the repair scope before collecting fuel-system parts

A sealing kit, a fuller carb rebuild kit and a pump diaphragm serve different work. Intake rubber sets and a year-listed petcock also have their own requirements; none should be read as a complete fuel-system package.

Parts to consider

1980-82 Honda CB750C / CB750K Carburetor Rebuild Kit Carb rebuild kit with jetsOne-carb package listing a bowl gasket, O-rings, float needle, primary and secondary jets, pilot jet and mixture screw with spring.View part 1979-83 Honda CB900 / CB750 Carb Pump Diaphragm ~ Replaces 16021-679-005 Accelerator-pump diaphragmKit containing a diaphragm with rod and bellows rubber, referencing 16021-679-005.View part Honda CB1100 / CB1000 / CB900 / CB750 Stock Type Air Filter ~ Replaces 17211-425-000 Stock-type air filterFilter element for the stated DOHC stock intake application, replacing reference 17211-425-000.View part

Related parts: Petcock with listed M18 x 1.0 thread · Four-piece airbox boot set · Pull throttle cable

Do not equate every carb kit with a full repair

The smaller carb service kit lists a bowl gasket, float needle and O-rings. The fuller rebuild kit also names jets and a mixture screw with spring. Both cover one carburetor. Pump diaphragms, tube seals, floats and hardware are separate choices, so use each package’s contents rather than its size or name.

Verify the connections around the chosen part

The petcock listing specifies M18 x 1.0 threads and asks buyers to verify the tank connection. Holder and airbox-boot products each supply four rubbers but specify different clamp requirements. The available pod filters describe another intake arrangement; compare what is actually fitted before making those selections.

Questions before choosing parts

Fuel is not reaching the carburetors. Should I buy rebuild kits first?

Check the supply side first. The original setup uses a fuel-line diaphragm, and Honda identifies blocked vent or vacuum tubes, the diaphragm and its check valve as possible causes of no fuel delivery. An internal carburetor kit will not address those restrictions.

Does a rough idle mean the carburetor jets need replacing?

Not necessarily. Honda’s fault list includes ignition trouble, contaminated fuel, incorrect idle speed and carburetor synchronization as well as carburetor faults. Diagnose these before buying jets; replacing internal parts is not a substitute for finding the cause.

Can a dirty air filter make the mixture rich?

Yes. Honda lists a dirty air cleaner among the causes of a rich mixture, alongside a stuck choke and float-valve problems. Inspect the intake and choke operation before treating rich running as proof that different jets are 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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