Check out my thread
http://buggymasters.com/forum/showthread.php?t=6351
on how to test your stator. It will give you some really good info that helped me sort out that mine had a bad pick up when i got it. I ended up replacing the whole thing but all i had to do was the pick up.
If your stator is bad dont sweat it its not expensive to replace the whole thing. You do have to buy the flywheel removal tool though
The job of replacing it is super easy as long as you make sure you match the stator and flywheel
There are 6 pole, 8 pole and 11 pole stators out there you will need to make sure if you get one that it has the same number of poles as the one that is in your buggy