RE: 25FX tuning problem?
The tolerances on RC engines aren't that tight, especially on something like a needle valve. So you happened to get one that's a little loose and has to be turned in more than usual. It's either that or you somehow have more fuel pressure at the carb than we normally do (not likely since you say your LA engine had normal settings). If this is your first .25 FX it may be that the factory setting on that particular run of engines is particularly rich. As said above, if the engine runs right there's no need to worry about it.