How does the ignition coil work in a CDI?
In a CDI ignition system,a storage capacitor is charged to a high voltage (a few hundred volts) by the flywheel charging coil and, at the proper moment quickly discharged into the primary winding of the ignition coil,which is actually a stepup pulse-transformer. The secondary output is a short very high amplitude pulse which fires the spark plug.
How does the spark timing on a CDI work?
The spark timing is controlled by a small trigger coil located in close proximity to the flywheel which generates a low voltage pulse (actually two, a positive and a negative one), as the fly wheel magnet passes by.
What happens if I Disconnect my CDI?
2) The charge coil and trigger coil are fairly robust devices and not likely to fail,measure resistance to ground (disconnect from CDI),if shorted or open circuit,they are defective or leads bad.
What to do if your CDI ignition is trouble shooting?
Trouble shooting hints. Caution ,if testing for spark ALLWAYS have a plug connected with the shell grounded,never ever test with an open plug lead, you may destroy the ignition coil. 1) Disconnect leads going to kill switch (shorting mode hookup!) and try starting engine (Figure out how to stop it in case it runs).
What do you need to know about CDI wiring?
For the time being leave this disconnected. Black/white wire – To the ignition/kill switch (You are correct in saying connecting this to the earth will prevent the ignition coil from sparking. The bike will still start if you dont connect this wire but you will need to stall the engine to cut it out)
Where does the spark plug go on a CDI?
The ignition coil (connected to the spark plug) is attached to the frame and seems to make an earth connection to the frame itself. I ran an extra cable from one of the holding screws to be an “earth point” for all my earth connection.
What to do if there is no spark at the ignition coil?
Check for voltage output at the ignition coil. Disconnect the ignition coil wire from the distributor and install the spark tester to the wire and ground the tester to the engine. Crank the engine for a few seconds. If there’s spark, the problem is with the distributor cap or rotor.
What happens when you replace the coil wire on an engine?
You can replace the secondary coil wire on an engine that uses one with an equal length of vacuum hose and the engine will start and run. The powerful spark will travel down the hollow hose to the distributor cap, but the engine will stall under any load because of the weakened spark.
How does a ground ESP work on a CDI?
Opening up the connections between these outputs and the CDI unit accomplishes the same thing, I would prefer shorting to ground esp., for the low level signal from the trigger output,a long lead would be connected to the CDI trigger input and a spurious signal could conceivably blow up the input device.
How does shorting a CDI ignition system work?
Shorting either one to ground will disable the ignition and stop the engine,in the first case the storage cap does not get charged,in the second it does not get discharged.
How big is the ignition coil on a Kawasaki?
Haynes, Clymer, and Chilton all make shop manuals, but the Kawasaki ones have more information. I’m not sure of the two stroke ignition coil ohm readings, but the 4 stroke bigger 4’s (Z1,Kz 900,Kz1000,Kz1100) usually test out between 1.8 to 3 ohmson the primary (small wires side).
How does the CDI work on the ignition coil?
In brief the CDI (ECU, Black Box, Ignitor) Grounds the Ignition coil which induces a spark at the plug. Assuming that the Ignition Coil/Coils have tested out OK then carry on…
What kind of ignition coil does Kawasaki KLE500 use?
The first picture shows one of the Ignition Coils on a brand new KLE500 i used for this Tutorial.
What causes the ignition to shut down on a Kawasaki?
Almost sounds like a problem with the kill or ignition switch wiring. Both of these will ground power to the coil, shutting down the ignition. Open up the handlebar switch pod that has the run/stop switch. On some of the older Kawasaki’s, the solder joints are starting to fail.