Got ready to go for a short ride 2 days ago on my new 2013 ST Ltd. and the battery was dead. I mean dead! It read 3 volts on a meter. Put it on a charger overnight and it started right up next AM. In the mean time, I called the service dept where I bought the unit and was told by the service manager; "oh yeah, they are battery hogs. Wish I had been able to talk to you before you left with the bike. They don't put out enough watts to cover the electrical load. You have to pretty much keep them on a charger when not being ridden." Seems to be true with mine. At the end of the day, it starts missing and running rough.
I struggle to believe this. But the proof should be in what you are doing out in the field. Are you guys and gals having to keep your Spyders on chargers to keep them running? I find this hard to believe, but so far it seems to be true with mine. Any advise would help.