So i flippped the motors and no difference other than my youngest boys truck seems faster.They are just running around on my paved driveway jumping a small plastic bmx ramp.Now it seems that my youngest boy is getting a real good feel for jumping w/out crashing.I checked mesh on both trucks today,and both trucks are free of any binding.Maybe ill swap esc. in the morning.Oh yeah,i landed a tripple back flip off there ramp today