Thanks Norm, So can rule out the old Harley and the ebay one that is advertised for a motorbike.
But the ebay momentary button is an N/O switch. How will it earth out the Magneto when both wires on the momentary push switch are positive and none go to Earth?
For ON/OFF, I reckon I can just use an ordinary flick switch but in reverse manner, so ON position is OFF, OFF position is ON. I had one on the old Honda engine to switch it on and off. Just had to mount it upside down.
