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Have you checked that it is fully grounded?
like i said take it back to the guy who did the harness or someone that can fix it.We can only help you out so much on a forum. I'm out!! Shark tank lingo!
http://www.suzukiHayabusa.org/forum/index.php?topic=158102.msg1524114#msg1524114If you can't deal with the guy who built your harness there is always this option, good luck on your quest.