CHARGING SYSTEM/STATOR OUTPUT

Does anybody know the stator output of a stock 660 motor? I would like to fabricate an asymmetrical dual headlight for my street moto. I do not wish to drain the battery every time I hit the high beam. HOW MAY WATTS CAN I RUN? Not that I have any extra green pictures of dead presidents, but what are my options for a rewound high output stator? 
