14% is plenty of oil, most times 8% is plenty. On almost every brand engine the "factory setting" is where the needles come from the factory for break in. If the engine is broke in then that would be way too rich. If it is leaking air from the front bearing then the idle would be high and it would still run with almost no idle gap. Try the idle gap at .5-.7mm adjust the lsn to get the idle speed, lean to raise the idle rich to lower.

Rex