My 2004 Rancher is not charging. I have bought a new battery and run all the voltage, resistance, and continuity tests as prescribed in the service manual and those found on this forum. The system all checks out except the charging test on the battery with the atv running. From a cold start the voltage goes to 13.5 to 14 volts for about 1-2 minutes and then drops back down to the battery voltage. From a warm start, the voltage is the same as the battery. I am trying to decide whether to replace the rectifier or the stator or both.