2007-2009 Kawasaki KFX50 service manual, Page 89Get this manual
5FUEL SYSTEM TROUBLESHOOTING Engine cranks but won't start No fuel in tank No fuel to carburetor Cylinder flooded with fuel No spark at plug Clogged air cleaner Intake air leak Improper throttle operation Engine idles roughly, stalls or runs poorly Faulty auto bystarter Ignition malfunction Faulty carburetor Poor quality fuel Lean or rich mixture Incorrect idle speed Misfiring during acceleration Faulty ignition system Faulty carburetor Rich mixture Float level too high Clogged air jets Clogged air cleaner Lean mixture Clogged carburetor fuel jets Float level too low Intake air leak Clogged fuel tank cap breather hole Bent, kinked or restricted fuel line Engine lacks power Clogged air cleaner Faulty carburetor Faulty ignition system