[mendoAu]

I've read alot but have a question about the 1984 ac/dc system. I guess I'm not as bright as I thought I am. I've decided to rewire the entire bike and upgrade everything. I've kept this puppy running thru-out the years and replaced cdi's, coils rebuilt the starter, and stator. But I can't get my head around the pulse generator, stator ac system. How come both produce an ac voltage but use a 12v ground to complete the circuit? Help me understand the pulse generator little black box and whats inside of it to create the "pulse" that is sent to the cdi (ac charged capacitor) to give the coil a spark pulse. And what voltage is sent from the cdi to the coil. Take me by the hand and dumbie me up. Thanks

 

[Goober]

Good question I haven’t read too closely about the AC/CDI circuit. But i think the pulse generator appears to be a large capacitor. The CDI likely sends a steady output to the pulse generator, which feeds the coil in pulse, the ignition coil amplifies it and sends a larger pulse to the plug.

The system is better described in the TRX350 Foreman manual in my link below. Careful the 86-87 Fourtrax (same manual) use an AC-CDI system while 87 and 88-93 Foreman use separate DC-CDI systems

 

[mendoAu]

Well I think I've gotten to the fact that the CDI receives a AC source from the stator that charges an internal capacitor in the CDI unit. This is the power source stored in the CDI that goes to the coil after the pulse generator sends a pulse to "release" it. But about that AC? DC? grounding question........And what kind of "pulse" leaves the CDI to the coil?