What is the BIGGEST motor for Kadet Senior?
I flew my Kadet Senior with a Saito 80, and was very happy with it. I would go along with a 91 four-stroke, but I can't imagine why anyone would want a bigger engine than that on what is supposed to be a sedate and well-behaved trainer. If you want something hotter, get a Decathlon or Citabria or something of that ilk.