Troubleshooting (No Spark Or Poor Spark) - Suzuki RM125 Owner's Service Manual

TROUBLESHOOTING (No spark or poor spark)

Step 1
1) Check the ignition system couplers for poor connections.
Is there connection in the ignition system couplers?
YES Go to Step 2.
NO Poor connection of couplers
Step 2
1) Measure the peak voltage of ignition coil. (13-6)
Is the peak voltage OK?
YES Go to Step 3.
NO Go to Step 4.
Step 3
1) Inspect the spark plug. (2-6)
Is the spark plug OK?
YES • Poor connection of the spark plug
• Go to Step 4.
NO Faulty spark plug
Step 4
1) Measure the ignition coil resistanace. (13-7)
Is the ignition coil resistanace OK?
YES Go to Step 5.
NO Faulty ignition coil
Step 5
1) Measure the pick-up coil peak voltage. (13-6)
Is the peak voltage OK?
YES Go to Step 7.
NO Go to Step 6.
Step 6
1) Measure the pick-up coil resistance. (13-7)
Is the resistance OK?
YES Go to Step 7.
• Faulty pick-up coil
NO
• Metal particles or foreign material being stuck on the pick-up coil and rotor tip
Step 7
1) Measure the exciter coil and charge coil peak voltages. (13-6)
Are the peak voltages OK?
YES • Faulty CDI
• Faulty wire harness
• Faulty engine stop switch
NO Go to Step 8.
ELECTRICAL SYSTEM 13-5