Post Master General
Join Date: Apr 2012
Location: Bowling Green, VA
I Ride: '09 ZX6R
The regulator limits the maximum D.C. Voltage which can be put to the battery..... Too high, and the electrolyte boils away. That's why you should never see more than 14 and change. 16, regulator is bad.
There are a number of reasons the measured voltage may be low, at the battery.
1) The alternator may be damaged, and isn't producing enough current to make the voltage.
2) there may be too much resistance to allow enough current to flow to make the voltage.
3) there might be too many things drawing power, which drops current flow to the battery, resulting in low voltage.
I 've always liked amp meters to indicate what is going on with a charging system, much more than measuring voltage. Easy to watch the battery recharge.... More current flow at first, dropping off as the battery approaches capacity. Discharge is always shown as negative flow.
Odds are good your stator (part of alternator) is burnt and has shorted out so it can't produce enough current.
The underlying question, is why? Nothing sucks more, than making the same 'fix' repeatedly.
It might have reached end of life and simply worn out. That wear can be accelerated dramatically, by shorts, or excessive load.
A multimeter will aide in sorting through the possibilities.
"Basic stuff fellas. Use your head for something other than to break your next fall." Words to live by