I have a 2001 kawasaki ke 100. The problem i am having is my headlights are dim. i have replaced the battery, and check the grounds on the frame of the bike. whenever i hit my brake or turn on my turn signals the headlight gets brighter. so is it the voltage regulator of the stator or faulty wiring?

I dont think its the stator or regulator. If it gets brighter when you put the indicators on or apply the brake light, it sounds very much like the headlamp is using their return to earth. I know you have checked the grounds (earth), but often the grounds or earths are linked up within the loom.
Do you have a wiring diagram? If so, identify which is the earth return for the headlight and run a direct feed back to the battery negative. If this produces a bright light, you will know there is a problem in the loom.
You could just wire a new earth into the system or start cleaning all the little connectors.
good luck