Just bought a de-restricted (pro circuit slipon) XR650R. It has a 172 main and 68 pilot. Me thinks these are too big for my altitude of 5-6 k feet where I normally ride. What should I be looking at switching these to? I was thinking a 162 main and 65 pilot. Also, how do I get the darn needle out of the carb so I can see waht position it's in?