The M600 cannot, but the I believe the M800 has that capability. It really wasn't a concern of mine since the dual spark offset was only designed to limit emissions by burning any leftover vapor during the cylinder cycle, after the piston has made most of it's stroke. As you know this retarded secondary ignition really doesn't add power since it doesn't have the compressive quality with the piston halfway down the cylinder and the vapor burn is more like a poof, unlike igniting all the gas at once when it's at it's most explosive state. It's actually better to fire both plugs simultaneously and this dual plug system actually helps HP when both plugs are constantly fired simultaneously.