Rockyroad, I agree with the others that have said your engine needs re-tuning. As Bruce said they come from the factory slobbery rich! They fly good like this with the limiter on during break in then it's time to loose the limiter & start leaning it out. You'll probably need to lean out the bottom end too to get that nice reliable idle & transition. I did with mine after about 10 flights. I currently have that same engine in my new Pulse XT & it is great running engine, very reliable. So don't give up on it just get some help tuning it from someone at your club with good experience & you'll be flyin high again![sm=wink_smile.gif]