My buddy has a 2004 1200 Sportster. He got it at a salvage yard the beginning of last summer - he retitled it and rode all summer after making some minor repairs. Then he garaged it after draining the gas tank. This spring he got it out to start it and the battery was melted. He replace the battery but now this is what it is doing; it turns over but it does not fire up, he says the battery throws sparks like crazy while he tries to start it. Any suggestions would be helpful - the brother is on a budget - hence having to go to a salvage yard in the first place.