Fault Finding CDI Ignitions on Dirt Bikes, Quads, and ATVs
Fault chasing a lack of spark on a CDI ignition on an XR125 using a multimeter, and building a Peak Voltage Adapter to measure the pick up output and the CDI box's output to the coil. This is a DC CDI, but the same applies to an AC CDI, and works for quads, ATV's and scooters.
There's a circuit diagram for the peak voltage adapter on the community page.