2004 Kawasaki KVF750 4x4, Service Manual., Page 82Get this manual
FUEL SYSTEM 3-23 Carburetor
Disassemble the carburetors (see Carburetor Disassembly)Carburetor Cleaning) Clean the carburetor (seediaphragm [A], and the O-rings Check the vacuum piston [B] on the float bowl, pilot screw, coasting enricher, and
starter plunger capIf any of the diaphragm or O-rings are not in good condition, replace them