DeltaForce,
I totally agree with Carl.E ! YS engines out perform all other 4-stroke that are out in the market today. I would even say that on 10% the YS would either equal, or out perform other 4-strokes out there with them being ran on 20%.

Also, My YS 110 FZ runs very well on 10%, and idles reliably too! I have recorded some RPM figures at http://www.rcuniverse.com/forum/YS11...1902708/tm.htm so check them out. Remember, these figures are with 10% fuel and in summer conditions IE: 80 degrees and above!

By the best, buy YS!!!!!!!

Ltr Dys and better Wys,
Dennis