neighbor has a 2007 330 trail boss, while camping kids said quad died,we had them try to pull start which worked once for a few minutes then died again, put it on a jumper and it started up but as soon as jumper cables were removed it died again(battery is completely dead)...seems to me that with the pull start quad should be able to be started but unless the battery is charged or hooked to jumper it wont, looked for piched,broken ,disconnected wires but found none.any ideas ,suggestions? I am not a mech but do maintain my own honda sport quads . somebody suggested the rectifier might be bad, anyway to test this without just buying parts and hoping?