I have a 1996 Kawasaki Bayou that I am having a charging issue with. During the day driving with no lights on everything seems fine. When driving at night with lights on however the battery drains down. It is a new battery. I have taken every electrical connection apart and cleaned and added dielectric grease to all connections and still same thing. Checked battery voltage while running and without lights its almost 13v and and stays there, reving engine and at idle. With the lights on it starts there and continues to drop. I am guessing stator or rectifier/regulator. I cant afford to take it to shop and not too good usuing ohm meter to figure this out so just looking for ideas on which it could be.