I just had the same thing happen to me this this past friday. I had about 40 miles left of a 700 mile trip and my speedy just died. Turned out to be a bad ground connection. There are two wires coming off the negative terminal. About five or six inches from the battery there is a plastic connector housing for the smaller black wire. The male side of this connector slipped the housing and disrupted the ground. I pulled the connector out of the housing and plugged it into the female connector and presto she fired right up. Did a more permanent fix at the hotel and drove it home sunday with no problems. Funny thing is I discovered the problem after calling AAA and having to pay $55 for the motorcycle upgrade. The fellas who responded were bummed because they didn't get to collect the 50 mile tow fee after traveling to the middle of nowhereville. So I tipped them $20 each for their troubles. At that moment I didn't care, I was happier than a pig in you know what because I didn't have to leave my bike 700 miles away from home for a repair.
