Changed motor now no spark
Jul 30, 2010 | 08:48 AM
#1
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Weekend Warrior
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Changed motor now no spark
My sons Kazuma Falcon finally took a dump last summer. The rings were shot and it was always ticking. Not to mention the cloud of smoke behind it! So I bought a new motor from Ebay and quickly realized that the wiring connections were not the same. I figured out the shift indicator lights easy enough, but the other going to the mag not so easy. After taking the cover off the old motor and then new one I believe I got them right. Just now I dont have any spark I turns over great and everything else seems to work. Is there anyway to find out if it is the coil or cdi causing it not to spark? Or could it be the relay under the seat? How much damage could I do if the wire are not correct to/from the mag?
Aug 1, 2010 | 06:23 PM
#3
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From: Tracy, California, USA
Is this your CDI?
If so, unplug the CDI and set it aside. Use a meter to measure the following:
1) Measure the resistance (in ohms) of the AC Ignition Power pin in the wiring harness to ground. Report what you read back.
2) Measure the resistance of the Timing Trigger Pin in the wiring harness to ground. Report this reading back as well.
3) Set your meter to read AC volts on the 200 volt (or so) scale. Turn on the ignition switch and crank the starter motor. While cranking measure the voltage on the AC Igntion Power pin to ground. What voltage do you see? You should see 45 to 80 volts AC.
4) Set you meter to the lowest AC scale you have (like 2 volts if you can go that low). Crank the starter again while measuring the Ignition Timing Trigger pin voltage to ground. What do you measure? This is going to be a really low voltage like 0.2 to 0.4 volts AC. It should not read zero.
Ignition power to the CDI and the trigger signal to the CDI come form the stator (which I think is what you call the mag). These have to be wired right in order to get spark. Miswiring it probably isn't going to hurt anything - it just won't work. The above tests check out the ignition portion of the stator and stator wiring.
There is another winding set in the stator used to charge the battery through the voltage regulator. Lets ignore that for now and get the quad running. Then we can test the chargng system later.
If so, unplug the CDI and set it aside. Use a meter to measure the following:
1) Measure the resistance (in ohms) of the AC Ignition Power pin in the wiring harness to ground. Report what you read back.
2) Measure the resistance of the Timing Trigger Pin in the wiring harness to ground. Report this reading back as well.
3) Set your meter to read AC volts on the 200 volt (or so) scale. Turn on the ignition switch and crank the starter motor. While cranking measure the voltage on the AC Igntion Power pin to ground. What voltage do you see? You should see 45 to 80 volts AC.
4) Set you meter to the lowest AC scale you have (like 2 volts if you can go that low). Crank the starter again while measuring the Ignition Timing Trigger pin voltage to ground. What do you measure? This is going to be a really low voltage like 0.2 to 0.4 volts AC. It should not read zero.
Ignition power to the CDI and the trigger signal to the CDI come form the stator (which I think is what you call the mag). These have to be wired right in order to get spark. Miswiring it probably isn't going to hurt anything - it just won't work. The above tests check out the ignition portion of the stator and stator wiring.
There is another winding set in the stator used to charge the battery through the voltage regulator. Lets ignore that for now and get the quad running. Then we can test the chargng system later.
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