How long should the battery on a GS last, when the bike is stored. Mine only just has enough power to start the bike after 30 days. (tracker installed and BMW alarm fitted).
no idea - but it'll be the BMW alarm which is draining it - its not a 'huge' battery.
you should consider a battery tender when stored - i have the Wunderlich Branded Optimate 4 CanBus - i ride the bike in the garage, plug it into the accessory port on the 'dashboard' of the bike and forget about the state of the battery!
How long should the battery on a GS last, when the bike is stored. Mine only just has enough power to start the bike after 30 days. (tracker installed and BMW alarm fitted).