Castle Creations motor and ESC combo recommendations for the Tekno SCT410.3:

Copperhead 10 w/1410-3800kv - 19T Pinion / 53T Spur  on 2s = ~31MPH (Small Indoor Track Racing)
Mamba X w/1412-3200kv - 25T pinion / 53T Spur on 2s = ~38MPH (Large Indoor/Outdoor Track Racing)
Mamba X w/1415-2400kv - 22T Pinion / 53T Spur on 4s = ~44MPH (Bashing)

Note: All speed estimates are with stock tire diameter, high quality batteries and appropriately sized battery connectors.
Always monitor ESC, motor and battery temperatures on new setups or when changing gearing or batteries.