How do you know if CDI is bad?
Troubleshooting CDI systems Symptoms could include misfiring, dead cylinders, backfiring, bizarre tach behavior, and countless other things related to how your engine’s running. The problem may get worse as the bike warms up. It might not even hold low revs at all.
How to check ignition coil and CDI testing?
Check the red wire on the stator. (it feeds the CDI) Set meter to AC and crank engine…should get 60+ volts…although I have seen them put out as low as 30 and still run. Also check kill switch by removing black wire that comes from the CDI.
How does the ignition plug in a CDI work?
The circuitry in the CDI unit uses this pulse to close a solid state switch (usually a thyrister) to discharge the storage capacitor into the ignition coil primary and generate the high-voltage pulse at the secondary to fire the plug.
What should I do if my ignition coil is not working?
Crank (Hit the starter button) the engine and watch the lamp it should flicker on and off as the CDI makes and breaks the grounding circuit. If the lamp either stays on or does not come on at all during this process the coil is not receiving the signal from the CDI.
When does a capacitor discharge ignition ( CDI ) stop working?
The switches ground out the charging circuit so the entire charging pulse is sent to the ground. Since the CDI can no longer charge, it will cease to provide the spark and the engine will slow to a stop. The major advantage of CDI is that the capacitor can be fully charged in a very short time (typically 1ms).
Check the red wire on the stator. (it feeds the CDI) Set meter to AC and crank engine…should get 60+ volts…although I have seen them put out as low as 30 and still run. Also check kill switch by removing black wire that comes from the CDI.
What should the output of the ignition coil be?
CDI output: Can be 5% to 30% less than the output from the stator. The minimum we have seen working is around 18vAC. The function of the ignition coil is to multiply the voltage of the power supplied from the CDI, and to send the multiplied power to the spark plug.
Crank (Hit the starter button) the engine and watch the lamp it should flicker on and off as the CDI makes and breaks the grounding circuit. If the lamp either stays on or does not come on at all during this process the coil is not receiving the signal from the CDI.
The circuitry in the CDI unit uses this pulse to close a solid state switch (usually a thyrister) to discharge the storage capacitor into the ignition coil primary and generate the high-voltage pulse at the secondary to fire the plug.