1985-1986 Honda Fourtrax 125 TRX125 Shop Manual, Page 236Get this manual
19TROUBLESHOOTING ENGINE DOES NOT START OR IS HARD TO START ENGINE LACKS POWER POOR PERFORMANCE AT LOW AND IDLE SPEEDS POOR PERFORMANCE AT HIGH SPEEDS POOR HANDLING
19- 19- 19- 19- 19- 4
ENGINE DOES NOT START OR IS HARD TO START
Probable Cause:
1Check if fuel is getting to carburetorFUEL TO CARBURETOR 2T ry spark testGOOD SPARK
NO FUEl TO (1) No fuel in fuel tank CARBURETOR (2) Clogged fuel tube or fuel filter (3) Clogged float lIallie
(4) Clogged fuel tank cap breather
WEAK OR NO
Faulty spark plug (21 Fouled spark plug (3) Faulty COl unit (4) Broken or shorted spark plug
Faulty alternator Broken or shorted ignition coil Fau lty pulse generator Poorly connected, broken or shorted wires (9) Pulse generator rotor gap incorrect10) Faulty ignition SWitch (5) (6) PI (8)