Bought my sled with a DP pipe already on it the previous owner said it had stock jetting, so I called DP and they tould me stock jets would be fine. It was 5 F below out today and out of curiousity I did a hot kill on it checked the plugs and piston wash, it was so lean it maid me sick. The pto side was leaner then the mag side so I took out the 520N's and put a 600 in the pto side and a 580 in the mag side, then did another hot kill and it looks about right. My question is has anyone else experienced this and why did DP tell me stock is fine. If I wouldn't have checked it I could have lost my motor.