[lutach]

High RPM and high load causes issues. Try the 2000Kv with 4S lipos and see how it does. If it's too slow for you, just get a bigger pinion. I run my BPP truggy with a 1577Kv motor on 5S (29175rpm) most of the time, but to show off I use 6S (35009rpm). Now my other truggy I run 8S with a 1100Kv (32560rpm) motor and it has proven to be my most efficient and powerful set up yet due to the characteristics of a lower wind motor offering higher torque (Shaft bending torque to e exact).