O don't know a lot about buells but I know that the tank should be sealed better than that. Also a buddy of mine had a similar issue with his nighttrain after it got wet and it turned out the water got into a connector on the wire harness. He found that out after some reasearch and discovered it was a common problem. The fix was simple to pop the connector open, blow it out with compressed air and cover the connector with that connector grease.