4-Strokes are toast, Milton. Go electric! By now, probably lighter, cheaper and more reliable.
Hey you, don't make me come back there, and unload my top secret "Skunk Works" stuff on you. Your going to have to hit up the F3A boys, to find something that can hang with my Saito "big block".
Word among the RC community is that, the Saito 62 is the best motor Saito has ever made of any size. That's pretty serious!!
Bob Reeves has got the Saito 40A wired tight. I'm talking, plug and play.
As of right now, the Saito's seem to be the best value for the dollar,quality performance wise.