ORIGINAL: Nathan King
The YS FZ-110S is far and away the best engine of the three. If you have somebody at your club that knows how to plumb and tune one (and is willing to teach you), I'd say go for it.
yeah this is the dilemma, I really dont. If i did i would definitely go for the YS and not look back. As far as tuning and running 4 strokes I learned it all on this forum. I had issues for a few days with the 55ax, but so did a guy with 25 years of OS experience, and i got it dialed in myself, with rcu help of course. Would be the same for the YS.
what kind of fuel do the above three engines burn? Will 10% still cut it?