Any information about why I can't get it to rev higher than 6000 RPM after 3 tanks of fuel and a 11x6 prop. I talked to a guy at Motion RC and he said to keep running it, that it needs to be broken in. I don't believe it. I have had quite a few gas engines and never have I seen one not run higher than 6000rpm after 3 tanks of gas and it is smooth through the whole curve. It idles and runs up smooth. I don't get it?
