My 01' WR426 seems to have 2 idle speeds. When the throttle is closed, its seems to go to a "fast" idle, then later drop to a lower idle speed, where it stays. The delay is not always the same, it is at least 4 seconds, but sometimes longer. This happens if the bike is in neutral, but it also does this in gear, so there is power behind it. Any one else experience this? Could the accelerator pump be continuing to pump somehow? The bike has 86 miles on it.