The 1.10 is a awesome engine. Mine started up out of the box and emediately idled at 2000 with no adjustments. The loyal OS guys watching it just watched in tears. My 1.10 when new turned 9,300 with a APC 16-6, and after 1 gallon turned 9,800-9,900. I also tried a APC 16-8 and it turned approx 9000-9100. The engine has a idle and throttle responce that is unbeleviable. Follow the instructions and as long as your not a needle jockie, the engine will run awesome. You must think about how the adjustment is going to affect the engine before you do it. After my engine had 1 gallon thru it, I never adjusted the needles again for the next 3 gallons.