I am having a similar issue. Last weekend my bike started funny then shut off then wouldn't start. Let it set for a few then fired off. Last night at bike night I started it up and did my ride threw the crowd and pulled out on the street, pulled up to the stop light and it just shut down. It was running fine but just stopped. Would not restart, had fuel in the line, turned over but nothing. The place where bike night is has a custom bike shop and bar so one of the guys working came over with a spark plug and check for spark and didn't have any. Got to lookin under the seat and when the key is on there is no lights on the ehc lit up. They let me keep it there over night and came back today with a trailer and brought it home. Thought I would try starting it and it fired right off but then shut down after a minute or so. Looked at the ehc again and turned on the key and no lights. Took co2 to the ehc and cooled down and the lights came on. Soon as it warmed up the lights shut off. shot it with co2 again the lights came on. Now everytime I try it, it starts. Would you just say the ehc is die'n on me? The person I bought it off of had all ready bypassed the ehc for the headlight and read that is usually the first thing to go.