My DP (now deceased) had a YS120 and it was plenty of power. It would hover at about 2/3 throttle and do anything I was capable of. 140's are great but if you have the 120 set aside, definitely use it, I think you won't be disappointed. An APC 16-8 seemed to be a good match on 20/20 fuel. (It's surprisingly fast for a bipe).