How about those Jett 2 strokes? They're supposed to be the hottest 2 stroke motor you could buy I thought. I remember asking the Hobby Services rep why OS doesn't make the older style pumped 2 stroke .60's, and his answer was "The new FX series has more power than those older engines; you don't need a pump." Um, sure. I never felt my .61 FX had that much power...but my .91 with a pipe isn't too bad.