Hello everyone, I have a question about a 140 sport. Up until this time I have owned 3 110's without any problems. Now I have an issue with the 140 both the DZ and the sport. I initially had a DZ and had problems with it and eventually it went back to YS for repair. While it was in the shop I bought a 140 Sport, because I am more familiar with that system and have never had issues with my 110's. I started the 140 Sport for the first time and it fired right away but would not take full throttle it would detonate (lean) at 2 turns out on the HS needle so I richened the reg. CCW seemed to take care of the problem. I am turning 9100 max and turned down to 8700 with a 16X8 Apc. Ok, everything is fine until I did Troys 4000 test. The engine ran at about 4000 give or take 50-75 rpm but after a minute or so it would shut down with a puff of smoke. I tried leaning the reg but to no avail it still shuts off. Has anyone had this or similar problem. Just a last note, it idles at about 2100 and transition is good.