My 2008 xb12 is not holding a battery charge. I have already checked the battery and used another just to make sure and they both are drained when im done riding.

Here are the symptoms.
-shutting off when coming to or stoped
-battery drained after riding it for no longer the 15 min
-all of my lights are NOT dimming when i use the throttle.
-it coughs and sputters when i am stopped.
-check engine light is on. tested and is code 16

I have narrowed it down to either the Voltage Regulator or the Stator. i need some help because i do not want to put out the money to have it diagnosed.


Can i test these with a volt meter and is there a diagram or example somwhere to show me how?