the Series of Motors are only rated for 200 watts total, which leads me to believe that have quite a bad bias, (they are for drills after all) and i do not believe that those are the motors we have, the smaller rs775 more closely matches what we were supplied, if the Bane-bots 12v is one of those, but at 12v, then it will be a different size physically, the smaller series of motors here:
http://www.mabuchi-motor.co.jp/cgi-b..._ID=rs_755vcwc
and 4/9 times 270 is 120. however efficiency also drops as current/voltage rises, so that puts the motor at somewhere around 90-110 watts.
Edit
The Bane bots motors are the smaller of the two motor spec sheets i initialy gave, verified by physical size. spec sheet here
http://www.mabuchi-motor.co.jp/cgi-b..._ID=rs_755vcwc