New 04 xr650r uncorked with drilled exhaust, airbox gutted, new carb boot, 172 main and 68s pilot with new comp needle and jet, clip in 3 down form top. I am at 1100' or so and temps in the 70's right now. Everything works great and the bike rocks, the only small niggling thing I have is this just off idle .....sticking!!!!!!!! By that I mean it feels like the slide is stuck closed and all of sudden bang.. too much open. Just kind of a pain when trying to pick your way up a steep boulder covered trail and you have this slow slow slow and then to give it a little more fuel then bang tooo much throttle. I have adjusted the throttle cables to spec (1/16 - 1/4" play) and tried more and less play. Still seems the same. I also have adjusted the fuel screw and there doesn't seem to be any real difference doing that. Hmmmm. Any ideas out there? The plug looks real nice too. The fuel screw going in or out does not seem to be having any effect at all. Whats up with that? Part of the problem or an indicator of wrong jetting. Any ideas?