I have been out a couple of times with my new to me 03 XR250R. I am having one small annoying issue. When I am sitting idling in first gear and I go to twist the throttle, it will hesitate, cough and die. I can get it past that point with a couple of quick twists and then engage the clutch or I can let the clutch into the very edge of the friction zone and then hit the throttle and its ok. This is after full warm up. I pulled the spark, it looks good and its not fouled, so I'm not running too rich. If I run it with some choke, it bogs. That tells me I'm not running too lean, right? The carb has been re-jetted and cleaned. It fires first kick when cold. Any ideas?