Apparently they came both ways, the original Q50 had magneto ignition..It looks like the coil mounts were milled off the cylinder...A C&H or other electronic ignition can easily be made to work..The larger electronic ignition Quadras have a magnet embedded in the bottom of the tapered aluminum hub with a hall sensor on a bracket mounted under the bottom left crankcase bolt..The sensor is about 1/2 mm away from the magnet...The ignition is timed to fire at 28 degrees BTDC...The carb should work with gasoline but might be a little touchy to adjust..The engine will have a little less power running on gasoline....