Category Archives: ATV Repair and Maintenance

Overcharge issue… PLEASE HELP

I’m at my wits end… I have 06 sportsman 450. Battery light flashing so I put on volt meter and getting overcharge (up to 18v @3000 rpm). I have new battery in it and just replaced ecm today. Put in new ecm and SAME DAMN THING!

If i put on lights it brings voltage down to 12+, likely because lights are bleeding off excess voltage. However, the voltage jumps around a bit from 10-13 volts with lights on.

The voltage regulator on these are built into the ecm so thats why I changed it out. The one I just installed is brand new and the one I replaced was just put in on recall in August 2015 (very low hours on it).

What else could be causing this? I cleaned all the grounds, and I visually inspected stator through flywheel when I had recoil cover off for rope repair.

Any help is appreciated.