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Message: [QUOTE="Russ, post: 167220, member: 21395"] "My hunch is that you have never experienced a well setup KDX" I've spent a lot of time on Dave's site. Tried 42 and 45 pilots and 155 and 158 mains in all different combinations along with various air screw settings of about an 1/8 or 1/16 turn at a time. I've run the REV and Torque pipes. Have the Boyesen reeds in. Done a bunch of throttle chops to check the plug (have a 7 in it right now). Have the 12 tooth counter on now. Did the airbox mod. If I STILL haven't experienced a properly set up KDX because I haven't done the big bore kit or the RB mod, then you're right. Is this what it takes? You hit the nail on the head with the blubber though. If we're talking about the same thing. The bike just doesn't seem to pull hard unless you twist a 1/2 turn or more and then it rips. Almost seems like I need a pilot leaner than a 42 if you know what I mean, but I just thought anything leaner would be dangerously lean because it doesn't sound like anyone here is going that far. Also, after doing a lot of slow, technical work in the woods, it takes a few seconds of WOT before it "cleans out." So now what do you think? I'd really like to keep the bike. It would be the easiest and most economical thing to do for sure. Two questions: Does the RB mod drastically hurt top end? Does the big bore kit hurt reliability? Thanks for your patience BRush! [/QUOTE]