2006 Honda Rancher Bad electrical issue

ok so to start my bikes electirc start did not work so we were just using the recoil start to get it running no big deal.
Then a few weeks later we take it out for another ride and the whole bike runs bad the automaic mode would run funny,then the bikes engine would not rev up in reverse and the pod went completely blank. then when you would drive it in forward all the lights on the dash would come on.
now the battery is dead all the time and when i try charging it, it still runs terrible. and when i try to use a multimeter on the battery the bike always dies now.
Has anyone ever had this problem before?