I'm trying to figure out whether my stator is bad.

Mine sits around 13.6 to 14.2 volts depending on if I'm sitting idle or if I have my light bar on.

[2015 Z Force 800 53/Trail EPS]

Always measure directly from the battery because anywhere else in any CFM system will result in a different reading. Test idle and at or above 2500 RPM. If under maximum or near maximum load and at or above 2300RPMs it stays above 13.7 (14.2+ is better), the system is likely just fine.