Wade take a look at this link. Make sure you click on the Truggy link.
http://www.teamtekin.com/t8.html
Input Voltage: 4S - 2250V / 2000kV
5S - 1700kV / 1550kV
6S - 1350kv
This is what Tekin recommends you use for each motor. This is more for racing than bashing. The lower the KV the more cells in the batter that you want to run. 4s = 2000kv 6s = 1350kv.
Nick