1989 Honda FL400R Pilot Service Manual, Page 249Get this manual
21TROUBLESHOOTING ENGINE DOES NOT START OR IS HARD TO START ENGINE LACKS POWER 21-1 21-2 POOR PERFORMANCE AT LOW AND IDLE SPEEDS POOR PERFORMANCE AT HIGH SPEEDS 21-3 21-4
ENGINE DOES NOT START OR IS HARD TO START
PROBABLE CAUSE 1Check if fuel is reaching carburetor FUEL REACHING CARBURETOR FUEL NOT REACHING CARBURETOR Clogged or kinked fuel line from tank to carburetor Clogged carburetor float valve Colgged fuel tank cap breather hole Clogged fuel pump vecuum tube Faulty fuel pump Clogged fuel valve Clogged fuel filter Carburetor flooded Carburetor choke valve stuck opened Clogged air cieaner Incorrect gasoline-oil mixture Fuelair mixture too rich Inproperly adjusted air screw Spark plug not changed frequently enough Spark plug with incorrect heat range