Welcome to the forums. X3, your charging system isn't working properly. More than likely, a bad stator or a bad regulator/rectifier. My guess would be a bad regulator/rectifier. By the way, a good battery should read at least 12.6 volts when fully charged. With the battery installed and the engine revved up, you should see somewhere around 13-15.5 volts.
Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!
You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.