I am looking for some help in getting an XR 600r properly jetted for riding in Colorado. I just got an 88 up and running, and it idles and runs low rpm fine. When mid throttle it's starving. Also, if I give the throttle a quick twist it bogs and then goes. I live at 5300ft and will be riding from here to 9000 ft mostly. I think I need to change needle jet setting up one? Does that sound right?