SA FLyer- My papers came from horizon. Paper doesn't talk about turns on needle valve but talks about 7000 rpm. I never checked the rpm while trying to break it in. My motor was made in 2000 I think. I bought it new from a hobby shop. Running 16x8 apc, 20oz tank mounted slightly higher than your recommendation, brisson pitts style muffler, moki plug, byrons10%with 20%oil. I can't change fuels yet, can't buy anything else locally. With the engine running rich it will die like you flip a switch, no warning. You talked about checking with guru, I'm one of them. Shows what I know. Any help would be helpful. Thanks