Will you guys tach your YS63 w/ 14x4 APC prop. I had to sent it my 63 for the regulator spring went bad. They fixed my problem and upgraded me to a new piston.

My performance before was with byron 20/20
13x6APC 11,500 peak flew it at 10,800
14x4 zinger 10,800 peak flew it at 10,200

now after the repairs. I ran about 40oz of fuel before I took these figures.
same 13x6 APC prop 10,600peak
Same 14x4 Zinger 9,600
so my rpm are down about 1000

I talked to dave at YS he told me to put on a 12x6 and fly it for about a gallon. So far I have flown almost 3/4 gallon. I haven't tached it w/ 12x6. I don't want to get dissappointed.