I have a UCD ,which I now have about 30 flights on,i have a Saito 100 on mine.Theres 3 other guys at my field with the same exact setup..I can tell you this ,the saito 100 is the best running 4stroke I have ever owned,and i've had YS,OS,and everything else in between...its a sweet motor,loadsss of power esp on a 15X6 pro zinger ...I favor the Saito 100 so much that I bought 2 more,1 on my 60 size YA suhkoi & 1 for my cap.my saito 100 is in my opinion more powerful than my 120 saito buy yet only like 2 ounces heavier than the 91.I honestly dont like YS ,i've seen too many guys have too many issues with the fuel regulator system on em,they are too temper mental for my taste.thats just 1 mans opinion tho.


Steve