yep fully warmed up, and the last one was at 200'
mineral yamalube, i stay away from synthetics and 2-smokers. haven't heard any good arguments yet about their advantages. i have a feeling there's a dried out gasket on the engine somewhere and is sucking in air leaning out the mixture.
same carbs on the other two JPX's on my 2-seater and they are running strong.
T.