I am a new owner of a 1983 Honda Shadow 750. This is my first bike that I've ever had so I have no experience repairing them either. So I got it home yesterday and had to jump start it because it had a dead battery. I know that it needs a new battery since this one won't hold a charge. I knew it when I bought the bike. So anyway, I jump started it, got it running and started riding. I went back out today to another dead battery. The difference is today when I hooked up the booster to the battery, the engine started cranking over. They key wasn't on or even in the ignition. I'm assuming that something is shorting out but I don't know where to start looking. I'm not sure if it is a cylinoid or what. Any ideas?