RE: How well did your YS run after sending it in for service?
I am looking for some help with my 63s.I have put three gallons of ys 20/20 thru it and loved every flight. It is in an 80 inch goldgerg cub. It used to do unlimited vert and now i have trouble getting enough power to do a simple loop. It smokes alot more than it did when new. I have tryed to adjust mixture for this but it only makes it run lean and get hot.I have replaced the plug with a ys plug twice. I have checked and re-checked valve clearence. I do not have a compression testor but this motor never seemed to have a ton of compression from new and it ran perfect. It might just be time to send it in to be freshend up but berfore I do that I am hoping for a few more things to try.
Thanks