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It could be the Cdi box, starter, starter switch, or a combination. I'd probably take it to a shop. I wish I could help more, but I just don't have much experience with ATV electronics, especially the newer ones.
thanks for replying. it is an 07 250 2x4, it starts manually ok, but nothing electrical works! thinking something burned somewhere in the elect. system! figure i'll have to take it to shop?