Originally Posted by TheE
I was actually curious about this too. I have a 1kV miniature inverter which would be perfect for the job, but can it cause damage to the bike in any way?
Not likely under most circumstances. But, depending on the CDI circuit, if the frame was charged and someone was able to ground one of the wires from the CDI, there might be a high enough reverse current flow through the CDI (bike frame to earth ground through the CDI) to blow an electronic component. This is probably so unlikely, it's not worth worrying about. In any case, the bad guy would probably sue you for causing him to soil himself.