2005-2009 Kawasaki Brute Force 650/KVF 650 4x4 Service Manual, Page 78Get this manual
FUEL SYSTEM 3-21 Carburetor
Turn the throttle cable pulley [A] to check that the throttle butterfly valve [8] moves smoothly and return back with the spring tension If the throttle valve does not move smoothly, replace the carburetor
Disassemble the carburetors (see Carburetor Disassembly) Clean the carburetor (see Carburetor Cleaning) Check the vacuum piston diaphragm [A], coasting enricher, and starter plunger cap If the diaphragm is not in good condition, replace it Replace the O-rings [8] with new ones
Check the plastic tip [A] of the float valve needleIt should be smooth, without any grooves, scratches, or tears If the plastic tip is damaged [C], replace the float valve [8] Push the rod [0] in the other end of the float valve needle and then release it [E]If it does not spring out, replace the float valve