I have been noticing that my chopper will not keep my rpm at 3800 when mowing at speed I used to when it was new. It used to surge real bad, but I took it to the dealer and they said it was running to lean, so the richened up the mixture. With all this rain I have been in some tough conditions and the power is not there. I feel the mixture is too Rich and I have herd this will robb your power. I don't have time take it to the dealer so If I could get some advice I will see if I can fix it my self.