Ok I am running the LarryCo jetting here in Colorado (38PJ 1.5 turns 65PAJ EKP#3 150MJ 160MAJ) (6K-10Kft) This jetting seems to be awsome in comparison to how the dealer had it set up. However since then I have added a power now and an WB R4 exhaust. I am just wondering if that is the rite jetting for the changes I have made. Part two I am thinking this weekend I will change my timing to YZ timing. What do I do with the Jetting then??? Just a side note that I am not to concerned with but thought that I would throw it out there. My head pipe has turned purple all the way to the heat sheild?? I know of two other guys I ride with, with the same jetting and they are not getting any discoloration on there pipes.