Testing the battery voltage, stator and regulator/rectifier are all pretty doable if you have the shop manual and a multimeter (and the knowledge to use it). Read and re-read threads/manual/etc a few times until it begins making a little sense and give it a go...or know your limits and take it in to the shop...
I just replaced my stator and regulator/rectifier. I thought my battery was dead. A new battery still wasn't holding charge. Tested the stator, it was bad. When I took it out, there was clearly one burnt coil.
2011 Imperial Red
Givi V46 / V35's SW Motech mounts
Skidmarx hugger Moto Werks bar riser
Mondo Motors LED Driving Lights
A little bit of road rash