The black motor is called a Chiaphua motor. It is supplied from Atwood Mobile. All of the specs are listed in a .pdf file on the first website. You can reach the file here:
http://www.usfirst.org/robotics/2002/tmup1.pdf
It has all specs including the torque-speed curve and power consumption rates. It also has data about the pinion mounted on the motor. The two cluster gears that come in the ball bearing bag mesh with the motors. You can find more information here:
http://www.chiefdelphi.com/forums/sh...&threadid=1571