I'm not familiar with that model, but I've got a couple of the YS-110's...

It kind of depends on how good you are at throttle management since the YS is capable of more power output than say a Saito 125. I've got one of these engines in a Funtana 90 with the 70" span weighing about 9 lbs. and I live at 4500 ASL which means we lose about 20% of an engine's output during the summer. The YS will haul it around with authority.

YS engines are not for the faint of heart and require careful attention to setup, but once there they are really nice. As you noted the low idle speed of these engines constantly amazes the glow guys at my club and a couple have tried the YS after seeing mine run, but none of them were happy with the engines as they couldn't seem to make them run right.

You must also realize that YS calls for a minimum 20% nitro and oil mix fuel, but they really run best including the low idle speed on 30% heli fuel.

The last thing I might mention is that they are usually very hard to come by and will generally require backordering and waiting for stock. Occasionally you might stumble into one in stock somewhere, but I had to wait for both of mine.

Not trying to discourage you as I think they are great engines, but they are high performance engines and as such do have their own rules you must live by or they will frustrate the h*ll out of you...