How do you test an ATV charging system?

To test an ATV charging system, start by using a multimeter to measure the battery voltage with the ATV off; it should read around 12.6 volts. Next, start the engine and measure the voltage at the battery again; it should rise to between 13.5 and 14.5 volts, indicating the charging system is functioning. If the voltage remains the same or drops, check the stator and rectifier for faults. Additionally, inspect the wiring for any loose connections or damage.