Honda motorcycle parts
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1981 Honda CB900F Supersport · Fuel System Buying guide
Start at the tank and trace fuel delivery to the four VB-family carburetors, then inspect the engine-side holders and airbox boots. A fuel leak, restricted flow and an intake air leak can require different parts; identify the affected assembly before choosing a kit.
M18 x 1.0 petcock1981 CB900F application with references 16950-MA4-671 and 16950-461-771.View part
One-carb sealing kitFloat-bowl gasket, float needle and O-rings for one carburetor.View part
Four engine-side carb holdersFour position-specific holders; clamps have separate size requirements.View part
Related parts: Stock-type air filter
Honda places the CB900F carburetor identification number on the left side of the carburetor body. Record it and inspect the fitted parts before ordering, especially after a carburetor swap. The original 32mm venturi specification is not the outside mounting diameter used to select a pod filter.
The basic kit supplies a bowl gasket, float needle and O-rings for one carburetor. Kits with jets list differing sizes and needle contents. Treat those as package contents to compare with the installed carburetors, not as a recommendation to change every jet during a leak repair.
Locate the wet joint with the engine stopped and away from ignition sources. Tank valve, hose, float-bowl, drain-screw and connector-tube leaks use different parts. A carburetor kit does not repair a leaking tank connection or an intake rubber.
Read the identification on the left side of the carburetor body. Honda identifies the original 1981 CB900F as using VB-family carburetors, but a previous owner may have changed the bank. Compare the fitted parts before choosing kits or jets.
No. The engine-side holders and carb-to-airbox boots are separate four-piece sets. Inspect both sides for hardening, damage and poor seating, then choose their specified clamp sizes separately from the internal carburetor repair parts.
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