my engine has an aftermarket stator the was added before i bought the bike im trying to wire it up and found an extra white wire i was told it was an extra is this true and if so i can i do anything with it to give me more spark

 

I believe if you pull the stator all together you might be able to find some kind of identification as to who made it. Then you could get in touch with them to find out what tha wire's purpose is intended for.

Also I don't believe that you will get anymore wattage than what it's rated for. For that fact if you did you might do sevear damage to the stator, bike, or even yourself.