if it were possible to power a motorcycle coil and trigger it with the stock set up ,my bro gabe builds voltage regulators that will convert the ac to 12v w a battery off the lighting coil. u could go small lithium 12v dc bet it would run it long enough to ride all day.he did one for his yt to run a high powered led head light he built.maybe with a battery set up u can eliminate the second source coil?