Cogging problems 9920/7XL

[Jasper]

Hello guys,

first of all, merry christmas!

I have been driven my savage today in the woods. And I had really bad cogging issues (wich I never had before). When the car was about 20 meters away, the car kept on cogging and drive really slowly. And the car was a few seconds out of control. The car didn't react on the commando's of the transmitter. When the car was in the range of 5-10 meters by me, the car responded well.

I had been made two changes to the truck. The motormount from a L form aluminium plate (50x80x1,5) to a 6mm motormount.







And I changed the steering servo from a standard HPI servo to an Kopropo 2015 FET servo. I connected the FET wire to the + of the receiver pack.

Could these two changes the reason for the cogging issues? Or does anyone have other possibilities? Let me know!