http://www.genetron.com.sg/files/Motor%20Catalog%20050908.pdfIt's a typo in the "catalog"!!
there this is the motor..look at the high torque motor
3 duty pole dc motor
speed of motor 7500-8900
It should probably be 6-7.2V
It's a little smaller than the ones used in cordless drills (which are closer to 300g).
If it runs reliably at 6V, 72V would burn it out instantly and besides, 72V is far beyond the safe limits.
The "3-pole" refers to magnetic poles.
You need gear reduction
(say 20:1 to 50:1) to get the needed torque, or the motor just stalls and draws a lot of current (possibly heating up to the point where it burns its windings)!
Stall current may likely be up to 15..20A.
Your battery needs to be able to supply 7.5A into a 1 Ohm load and your motor controller needs to be able to handle this as well (of course).