motorhead, we will have to know what bike you are working with but if an early Wing 14-15 volts is normal with 15 being on the high side but still within spec. If it is doing something different that it usually does then check the battery cables for clean TIGHT attachment at the battery & make sure the battery if full of fluid (the 2 major causes in voltage fluctuations)..Hey guys! While crusing the Blueridge foot hills yesterday, my volt meter shot up to 14-15 volts. I put a new CD player on last week, but that should drain if anything. Bad voltage regulator?