brushless rusty speed testing

[Finnster]

How did you break the motor? 12 cells on a 5700 is way too high of RPMs, over 75K! You shouldn't go over 9-10 cells max w/ the 5700.

Really those speeds are pretty poor, sounds like the truck is way undergeared as well. I can easily do mid 40s on 7 GP3300 cells on a 380C/6L (5800 kv,) so 12 cells should be into the 60s (before it blows up.) What gearing are you using?