I was very happy with the HP 25 numbers.
HP 25 rotary valve four stroke
Fuel===Wildcat 10% with 18% full synthetic
Plug===Glo-Devil 4 c Special for Saito and Enya
Exhaust=Stock
Prop #1=HY 9 x 6 rpm===10,300 HY, took over Bolly props.
Prop #2=Xoar 9 x 6 rpm==10,470
Prop #3=Xoar 10 x 5 rpm==9,020
Idle, so far 2,800, very nice though.That is a 14 oz tank, it took an hour to take it down to the top of the tank bracket.