Would this work?

[JOHNNYMAXXIMA]

Originally Posted by What's_nitro?

Yeah that's it. I was gonna say you need to keep the voltage under like 5 volts or it will over-rev the 9920. I believe the limit is 42k. That's a 1S motor!

Well I just tried it on a 1s that I had. Same pulsation. I will try to reprogram it and see if that does anything.