Have recently had the same issue with my 08 Heritage. Fire just went out one day shifting into 2nd. Stopped switched ignition off and on, nothing. tried it 2 or 3 times more times, still nothing. Everything else was on, lights etc. Reached up and turned the kill switch off and back on, and it fired right up. About 2 weeks later I was going down a Interstate entry ramp at about 70, just shifted to 6th and fire went out. Hit the kill switch off and back on real quick and it re-fired as soon as the fuel hit cylinders. Called dealer told tech about it. Both of us felt it must be a bad switch although he said he's never seen a bad one. Took it in, ran the codes and found none. He put a new kill switch on it, actually he replaced the entire right hand switch module. That was a week ago. Only ran a couple hundred miles since. So it is a wait and see situation at this point.
Let me know what you find with your RK, and I'll update if it happens here again.
D.Orr