Not sure about the warranty, but if you don't ride it for long periods then it is possible the battery charge isn't being properly maintained. Not sure of the situation before you purchased the machine, but at the dealer in my city, they put the machines out by the street during the day and then move them back to storage at night, so it's possible that with the constant starting without actually riding the machines for long periods that the batteries would get discharged. If your machine was used in a similar way while at the dealer then it may have just been badly discharged when you got it.