put one of these on an 800efi it lasted less than a hundred miles till it failed. no problem as they will send me a new one but has any one else had failures and or how long have you used one??? thanks for any help

 

I have them on my preds. I have only had them on for about 20 miles with 0 problems. Do your self a favor and send it to nicholas cycle to have him remap it for you. I thought the stock map sucked. When I got mine back from NC It was crazy. It made a night and day difference.