I bought a new Magnum .91 fs a couple of weeks ago .This one has the crankcase vent , running back to the intake. I ran a gallon of Omega 10% very rich settings. After running a gallon thru it, I fueled it with Omega 15% and set the needle for flying. Like my other Magnums/ASP fourstrokes , it runs flawless . Unbelievable idle and top end and throttle transition is very good.
I use to fly only Saito but after a few years of Mangums/ASP I rarely look at Satios when I need a new engine.. Satios are great engines, but just like O.S are way over priced . Heck you can buy a shortblock , small block Chevy for what a these small highend 4 strokes cost. lol