2005-2009 Kawasaki Brute Force 650/KVF 650 4x4 Service Manual, Page 79Get this manual

2005-2009 Kawasaki Brute Force 650/KVF 650 4x4 Service Manual, Page 79

3-22 FUEL SYSTEM Carburetor
Check that the vacuum piston moves smoothly in the carburetor bodyThe surface of the piston must not be excessively wornIf the vacuum piston does not move smoothly, or if it is very loose in the carburetor body, replace both the body and the vacuum piston