RE: YS cdi voltage
Is the output you refer to, the lead going to the back of the engine? I have never checked this as I never thought of there being voltage there. This is the lead that goes to the sensor that triggers the capacitor to discharge. I suppose there would have to be some current there for this to work. If so, the voltage may not be the same as the input. I don't know much about this so maybe someone who does can confirm if this is the case or not. This is just how I think it would work.