Originally Posted by
dr.tom
Well I believe ground is provided over spark cable shield, and over L shaped cap to spark body, and inner electrode gets high voltage from spring inside L plug.
I get sparks with plug removed from engine but of course plugged in L cap when turning hub over... never initiaded spark with L cap empty, heard it can be bad for CDI, would nit like to test wrong/true if I dont have to.
.
I believe that I described that.
The point of course is that absent a stinking spark plug grounded at the connector, the secondary voltage is looking for the next low resistance point..
Have fun, good luck, you have it....