The pulse switch is the thing you are calling the "sensor". It is also known as the Hall Effect switch.

Do your test at the end of the female Deans connector coming from the ignition box - it is the 3 wire lead with red, black, and white wires. Short ONLY the white and black wires by poking a "U" shaped wire in the end of the Deans connector. Keep repeating this and you should get a spark each time.

Just unplug the pulse switch connector and do the test on the end of the female connector.

Let us know if you get a spark when you do this.

I am not familiar with the Perry conversion so I don't know what the pulse switch configuration is like - but I'm sure it is there<G>.