1987-2004 Kawasaki Mojave KSF250 Service Manual, Page 36Get this manual
2-18 FUEL SYSTEM Fuel Tap Installation OFuel tap installation is reverse of removalNote the followingeBe sure the O-rings are in good condition to prevent leakseBe sure to clamp the fuel hose to the tap to prevent leakseBe sure the nylon washers are in good condition to prevent leaksaDo not use steel washers in place of the nylon washers, because they will not seal the bolts properly and fuel will leakIf the fuel tap screens have any breaks or are deteriorated, it may allow dirt to reach the carburetor, causing poor runningReplace the fuel tapIf the fuel tap leaks, or allows fuel to flow when it is OFF, replace the damaged gasket or O-rings
Fuel Tank and Tap Cleaning eRemove the fuel tank and drain it (see Fuel Tank Removal) Pour some high flash-point solvent into the fuel tank and shake the tan to remove dirt and fuel deposits