Honda motorcycle parts
Choose your model and year to see parts listed for your bike.
Choose your model and year to see parts listed for your bike.
1981 Honda CB750K · Fuel system Buying guide
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.
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
Accelerator-pump diaphragmKit containing a diaphragm with rod and bellows rubber, referencing 16021-679-005.View part
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
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.
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.
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.
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.
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.
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