Why the biggest main jet of the DJ Stage 1 Jet Kit is #136, while the OEM of my S is #142.5 ? The plug reading is quite white, which means it is running lean (with 3x3 and Akrapovic full system). I ran the DJ kit for 4 weeks, not notice any gain over the OEM carb setting. My S seized in yesterday, found out to be caused by a broken EX valve. Not sure if it is related to the lean mixture, or it is just a valve defect.