I captured the following three (3) signals to/from the CDI of my TAO 825 AGTV. The "BLUE" signal is output of the Stator. The "YELLOW" signal is the output of the CDI going to the ignition coil. The "PURPLE" signal is the output of the Pulse generator. The display also shows the voltage scale for each. My question is that the display show the Stator and the Ignition signal appear to occur within the same timing period. the Pulse Generator signal does not occur in this time period. Could this "possibly" be the cause reason why the ATV will not start?
i.e. The timing is off between these signals? My ATV does not have any mechanician to adjust the Pulse Generator in reference to the Stator.

 

I've never used oscilloscope methods for tracing ignition faults but those downward yellow spikes seem to be the ones for the ignition, it has missed one, but there is a slight upward from the pulse, then coil gets downward spike. What all those upward yellow spikes to coil are, I don't know.

 

This looks a lot more difficult than it needs to be LOL

First thing that catches my eye. If the purple is the pulse generator, meaning the trigger right? So each purple spike is one engine revolution.

having the purple spike at a different time than the yellow spike is most likely normal as it takes time to charge the capacitors in the CDI.

The change in intensity of the spikes, or voltage. Are you pull starting it with the recoil rope? that would explain why it was weak, got stronger than weak again.

Looks like your stator is working great.

Anyway you have a signal out to the coil, but do you have spark? You should. Even if a little weak.

Does it backfire when trying to start it? Have you tried using some starting fluid? Does it pop through the exhaust or the intake?
If the timing is off it will still ignite fuel and blow back through the intake or exhaust.