I just finished my 2 gallon of byron 20/20. Fuel in mine. Mine will tach a 13x6 APC at 11,400-11,500 peak. I back it down to 10,400 and fly it.

Right now I have a 14x4 zinger on it peaks out at 10,900 I fly it at 10,000. I could probably lean it out a little more. But I am scared it will blow up. I really love this motor.

I have it on a Morris Hobbies Top Cap Arf. total weight is 4.5lbs. performance is unbelievable. People think I have a Saito 91 on it. I tell them something bigger and better.........(long dramatic pause......) a YS 63. Then they responce NO CRAP, that small of a motor pulling a 4.5lb plane like that.... Most people don't belive me that is only a 63...

my 63 will out pull a saito 91 any day of the week.