RE: Kyosho inferno st US sports engine break in problems please help!!!
If you want to use 30% break the motor in with 20% first then switch over to 30% and idle a few tanks in for the new fuel to settle into the motor before you get on it. Then you should be set. Also buy a few extra plugs, I always go through a few breaking in a new motor.
Let us know how you make out.
TB