I have a Vulcan 800 End the bike will start right up ride like a dream And then when I shut it off to don't get a drink or something like that and then go right back to it to try to start it it's like the battery dies and then if I wait overnight or a couple hours it'll start backup again but then if I shut it down again it's like the battery dies does anybody have any suggestions if a cell in the batteries bed or something else