Fuel System

The Honda CB500K / CB550K use four individual Keihin 022A carburetors (one for each cylinder) connected to a common mounting plate. They are a bank of all mechanical round slide carburetors with a dual fuel inlet and are controlled by a dual throttle cable set up (pull and push cable). Note the CB550K3 / K4 (1977-1978) uses a uniquely different model of Keihin carburetors which only appeared on this late version of the bike, which have their own rebuild kit and throttle cables. These carburetors need to be synchronized for the engine to run properly. Depending on tank styles there were no less than three different petcocks styled used during the production run.