James, I am using 3c lipos 1320mah and the motor I im using comes with a resistor. It is the motor with the Grey colored end caps. The motor is rated for greater amps. Check out this site as Helihobby www.helihobby.com/html/blade_helicopter.html has everything you would need. So you might next ask how do I get the original tail bracket off?? First start with a little CA debonder and be patient wait ten min or so. Then twist and turn is this won't do the trick and chances are it won't then use you dremel with a cut off wheel and cut parallel to the main boom on both sides. You don't have to cut all the way down to the boom just enough so then use a large flat bladed screw driver and twist inside of the cut area you have prepared. Lastly be sure and clean off the debonder as it is oily before CA'ing the new one on. One more thing before you CA it pull the wires through and add 1.5!QUOT! to the motor wires then before you place the new tail bracket on carefully position the 4in1 end of the wire to the 4in 1 to be sure you have the wire long enough to reach the 4 in 1. after the tail bracket is mounted the wires are to difficult to pull. So do the wire thing before you CA anything. I learned this the hard way. I also mount the new motor to the bracket with the heat sink so it is fitting good and the heat sink fins will cut your wires if not set right. Don't let all this frighten you it will all come together. I have broken mine many times learning to fly these things and if you are not crashing your not learning to fly!!!
Good luck and let me know how you do.
Don