Pickup gap should be between 0.018"-0.020". Pull one of the spark plugs, and put it against the head. Have a friend kick it over. It should be bright blue. If that doesn't work, try eliminating the kill switch. Take the radiator cover off, and unplug the plug going to the kill switch. Now try it. If that doesn't work, try the key switch. Unplug it, and jump the Black/White wire to the Black/Red wire. Now try it. Just curious, when's the last time you replaced the spark plugs?