After tearing it down, cleaning, rejetting, touch-up painting, & electrical work, I finally got it back together around 5:00pm and rode around town for a couple of hours. This bike is a BEAST!, fast, fast, fast, I may never ride my KLR again! I did notice a couple of things though, first it seems before bike is completely warmed up, the clutch feels like it is slipping a little, once warm it doesn't seem to do it at all. It has the 628 kit in it and the manual shows a clutch so I have to assume that when the kit was done a clutch upgrade was done also. Is that accurate or dop I have a problem I should look into? Second I hear a vibration it sounds like the front of the engine, I first thought it was valves but it just doesn't have that same sound, anything anyone else has experienced? When I pulled the carb apart there was a 158 main jet installed, and the power up manual calls for a 152, so I changed it out, I could'nt feel any real difference, except a little less hesitation at full throttle. The pilot jet was completely plugged, I don't know how it would even start before, it took me about 15 minutes if cleaning to get all the crap out. It now starts on the first kick and idles very nice, it is smooth and no fluxuation as before. I'm sure thouroughly cleaning the carb and setting back to spec made the difference. Is there any reason why I would run the 158 over the 152? Like I said it seemed more responsive with the 152 main. Tomorrow I am going to take a ride into the foothills and get onto some Forestry roads and really see what this bike can do. Riding in the city it is an absolute monster, not very tame at all, I find myself leaning forward when taking off from stoplights to keep the front wheel on the ground. I'll bet most people wish they had that problem, now I know why all you XR guys always seemed so happy. I'm glad I found out what I was missing.