Thanks, Matt
The SC's were by far the most powerful of the YS 120's. Unfortunately, they sometimes were very unfriendly to use and that is why YS discontinued them. As you know, YS has now discontinued all 120 size engines, We are replacing the 120 with a new sport 140 size engine this summer. See
www.ysperformance.com for further info on this and HP ratings.
Good flying!
Dave