Hey guys we have a 04 wr450 we got used. It had a bad aftermarket stator,reg . We replaced it year ago with a Ricky stator and new battery. It has been fine for about 15 rides.Last week on 3 day ride, battery went dead on day two. So we had to kick start,after 4 hours.Would only run at 1/4 throttle,pulled main jet. Checked no problem there. Got bike back,put battery on slow charge. Charged it up in 4 hours, runs perfect. We will check charging. Does it need battery to run this bike?